You can send money with a card or without one. Just login to the app, select a card, grant the app permissions to access your friend list once, select the friend you want to send money to, add a personal message, enter the amount you want to send, select the payment method, confirm the payment using your Paypal credentials, and you’re done.
While there are a couple of good Paypal apps on Facebook already, this is as simple as it gets.
Additionally, there is no 30% transaction fee by Facebook, only the regular fee you would usually pay Paypal.
Paypal already has hundreds of millions of users worldwide, and now it can reach even more, thanks to Facebook’s huge user base.
It’ll probably become one of the most popular apps on Facebook, enabling personal micro-transactions in an easy way.
I’m assuming that if you send money to some friend who doesn’t have a Paypal account, he will be prompted to create one first. Paypal had initially used the same tactic with email, to expand its user base years ago. This could very well be the second coming of Paypal, after years of stagnation.