Ask HN: We didn't get a single person to pay for our SAAS – what could be wrong?

It's not the product, I strongly believe we have a decent product. we recently launched Sieve PRO https://www.producthunt.com/posts/sieve-pro https://www.sievehq.com/ a saas, where we provide all tools for anyone in tech to start freelancing in 15 minutes. This includes a personal website, client on-boarding, NDAs, requirement collection, eventually invoices, payments, and agreements. When we had 600 people coming to our website, had 400 people click the signup but only 40 people signed up and NO ONE PAID. We were asking for yearly payment $348 ($29/mo) as a part of Elite 100 program where we give away 100,000 shares for the first 100 people and all the features coming up in the next year for free. What did we do wrong?