[leetreveil]

I like the implementation but I don't like that it has a brand (Mozilla) attached to it.

Stripe is doing this right, when you make a payment on a website you have no idea that you're using Stripe.

[shardling]

I won't put credit card details into a site unless I have some trust in the system they're using. The lack of a brand isn't necessarily a good thing here.

In any case, the brand is for marketing to developers right now -- once "Persona" becomes a thing in and of itself, this will be a nonissue.