Fliggo does it right:
Fliggo Pro is a minimum viable product in action. MVPs reduce time to market. It’s a good sign when people sign up to be notified. And if nobody signs up, you build the next iteration and see if that’s the minimum viable product.
How would you modify this MVP to collect credit card numbers? Could you promise to not charge customers until Fliggo Pro is delivered? Could you give customers a discount for buying early? What do you think?
Add links to your favorite minimum viable products in the comments.