> Likewise, if someone is on a second round with us and hasn't bothered to use > our free tier, that also tells us a lot about their (dis)interest in doing for > what is, for everyone else on our team, career-defining creations.

This makes sense. After a first round, if I'm still interested in a company, I want to dig in and find out everything I can to see if they're a likely fit and signing up for a free tier (if there is one) is absolutely a no brainer. And it's usually is a great way to form some meaningful questions to ask in the next round of interviews if I AM interested.