Yeah, it does sometimes confuse people. This is something we're considering about changing (the flow worked differently when we were invite only), but we thought it was worth experimenting with a little longer.

Mostly, I think it depends on the type of app you have. For something like 280 Slides (a previous project I worked on), it makes a lot of sense to get started right away without having to sign up. We'll see how things go for Stripe.