We've chosen PayPal, because of few very cool features: 1. It supports B2B payments. We us this model, because we don't want to keep your money. Whenever you w

We've chosen PayPal, because of few very cool features: 1. It supports B2B payments. We us this model, because we don't want to keep your money. Whenever you want to tip somebody you do it directly to that person. 2. You can still receive money even without being a member of PayPal. If you are not a member and somebody makes a payment to you, PayPal sends an email asking you to register and receive your money. 3 It's very simple for you (you just need to put an email address).