How to Tell Who Will Actually Pay for Your Idea

"Would pay for this" is the easiest sentence in customer discovery to produce and the hardest to trust. It costs the speaker nothing. It is polite. It tells you the person liked your idea, which is a different fact from whether they will ever open a wallet.

This article is about a better thing to read for: the sentence that survives a check. We will show how to tell, from a single public post, whether someone already spends money on a problem, how to do it by hand with nothing but a search box, and how FirstCustomer's scoring enforces the same discipline.

Why the pay-for-this sentence fails

There are three reasons a stated intention to pay is weak evidence.

1. It is hypothetical. The person is imagining a purchase, not describing one. Imagined purchases are free, so people make them generously.
2. It is social. Telling a founder that an idea is worth paying for is kind. Saying "we already pay a competitor and the price is too high" takes more effort, so it happens less often and means more when it does.
3. It carries no detail. A real spending sentence has a shape: an amount, a tool, a frequency, a person who is paid. An imagined one is a mood.

One founder in the posts we studied put the gap plainly: the problem existing and people paying to fix it are different things, and most ideas die in the space between them. Another asked the question that matters: are they already paying for something bad, using a spreadsheet, or did they try to solve it last month? That is the whole technique in one line. Read for behaviour, not opinion. We went through that corpus in what 494 founder posts actually say.

Three kinds of money sentence, ranked

When you read a public post, money shows up in three different forms. They are not equal.

1. Paying now

The person says what they spend, or that they have a subscription, a vendor, a licence, a renewal date, a seat count. They describe a current cost.

One poster in the research we reviewed called a user-interview panel "way too expensive" for the stage they were at. That is a person who paid, formed an opinion about the price, and said so. It also tells you something specific about the category: money moves there, and the complaint is about value, not about whether anyone pays.

This is the strongest form. A budget line already exists. You are not creating a habit, only offering a better place to spend.

2. Paid a person

The person hired someone, outsourced the task, or pays a freelancer or assistant to do it by hand. This is easy to miss because no software is named. But it proves two things at once: the problem is worth money, and the person will hand money over to make it go away.

3. Shopping

The person is looking for a tool, asking for alternatives, or asking what others use. This is real intent and worth a message, but it is weaker than the first two. Nothing has been spent yet. The shopper might choose a free option, or choose nothing.

The sentence "would pay for this" belongs here at best. It is shopping dressed as a commitment.

The negative signal matters as much

Money signals have an opposite, and a technique that ignores it will flatter you.

Some posts say outright that the author cannot pay: no budget, a student budget, free options only, the cheapest thing available. These people may have a real problem. They are not your first customer. One poster in our corpus wrote that they could not offer money because of a student budget. A good reader takes that sentence at face value and moves on to the next post instead of hoping a demo will change the answer.

Reading for money means reading for both: who says they spend, and who says they cannot.

A worked example

Take one signal FirstCustomer surfaced, a single sentence from a public post: the author "spent $200+ on competitor tools and was a better decision than buying a course".

Look at what that one line contains.

• An amount. Over two hundred dollars, not "some money".
• A category. Competitor tools, so the budget sits in software, not services.
• A comparison. The author weighed two ways to spend and picked one. That is a purchase decision with an outcome, not a wish.

None of it is a promise. All of it is a record. That is why the signal scores 68 out of 100 and carries a willing-to-pay mark. It is also why a stranger could verify it: the sentence is on the page, in the author's own words.

The check: does the sentence exist?

Here is the step that makes the technique work, and the one most people skip when they read by hand.

Before you count a post as proof of spending, find the exact words in it that prove the claim. Copy them. If you cannot point to a sentence, you have an impression, not evidence. An impression feels the same as evidence while you are reading and falls apart when someone asks you to show it.

This is the rule we built into scoring, because a language model has the same weakness as a hurried human. It can read a post, form a confident feeling about willingness to pay, and report a high number without any words to back it up.

How FirstCustomer's scoring enforces it

Every post FirstCustomer finds is scored on five dimensions, and willingness to pay is one of them. The weights, as they stand in the scoring code:

• Pain being real: 0.20
• Damage right now: 0.25
• Willingness to pay: 0.25
• Fit with the idea: 0.15
• Contactability: 0.15

Willingness to pay carries a quarter of the score, tied with damage for the heaviest weight. Spending behaviour counts as much as how much the problem hurts.

Then come the checks that keep that weight honest.

The quote requirement. If the scorer rates a post above 40 on willingness to pay, it must also return a quote. The system checks that the quote literally appears in the author's post, ignoring case and spacing. If it does not, the score is not trusted. It resets to 20. A confident read with no evidence is treated as a weak one.

The cannot-afford penalty. If a post is flagged as saying the author cannot afford a solution, 40 points come off willingness to pay, never going below zero. The order matters: the quote check runs first, so a post that fails the quote check and also says the author cannot afford it ends at zero, not at some in-between number.

The effect is that high scores go to posts where the author's own words show spending, and the list that reaches you is built from sentences you can read, not impressions you have to take on faith. The same quote requirement applies to the damage dimension, so the pain a signal claims is also anchored in something the author wrote.

We should be clear about what the system is. It is a ranking for a human to read. A literal quote can still be sarcastic, and the score does not replace your own reading of the post. What the check guarantees is narrower and more useful: the evidence behind every high willingness-to-pay score is on the page for you to judge.

Do it by hand today

You do not need any software for this. Here is the routine.

1. Collect ten posts where someone describes the problem you are exploring. Public forums and community threads are enough.
2. Underline every money sentence. An amount, a tool name, a subscription, a hired person, a renewal, a switch.
3. Sort each one into paying now, paid a person, shopping, or cannot pay.
4. Throw out any post where you cannot copy the exact words. If you are paraphrasing in your head, you are guessing.
5. Read the paying-now group first. These are the people whose budget already exists. Look at what they complain about in the tool they pay for.
6. Write one question per person that refers to the specific thing they said they spend on. Not "would you pay?" but "you mentioned the tool you use costs more than it is worth, what would have to change?"

The last step is the one that changes the conversation. A person who said what they pay can answer a question about what they pay. A person who only said they would pay can answer with another opinion.

The takeaway

Next time someone tells you they would pay for your idea, treat it as a compliment and nothing more. Then go looking for the sentence that survives the check: a number, a tool, a hired person, a renewal. If it is on the page in their own words, you have a lead. If it is not, you have a mood.

FirstCustomer runs this check on every post it finds for an idea, so the shortlist you read already comes with the quote attached.