the problem with paypal is that paypal only accept CC and usa bank accounts... pbc accept local countries billing methods, wich is great for people who can't afford a international visa cc or live in south america... i hope paypal add other payment methods soon
They use paypal. Paybycash has had some really bad rep. More than paypal had.
They operate the same, but paypal is more widely accepted.
But paybycash is way faster because payment is instead via your bank and does not require a account, paypal takes weeks to get your account authorized for use with you bank account, atleast my old paypal account took 5 weeks before I could use it with my bankaccount and even after that it wasn't very userfriendly.