[btipling]

I wrote a lengthy question and signed up but at the payment screen it required a credit card. I would have preferred a third party service like PayPal. I am not inclined to enter my credit card information into random websites. I would have been happy to donate the $20 otherwise.

[notahacker]

It's not that random, it's a startup which has raised over $100m, much of it from Andreessen Horowitz.

That said, it's a Bitcoin startup so it's weird if credit card really is the only accepted payment method.