[JoeKM]

PayPal is global, for one, and they have reputable foundation. They have brand recognition too. You and me know about Stripe/Google Wallet/Amazon Payments/Dwolla/etc. but does John Doe from Craigslist/Ebay/"Mom & Pop shop" know about them?

[ziko]

No but if he uses Gmail (and it's a pretty good chance) he will. If not, he will find out sooner or later.

Paypal's era is coming to an end, it was just a matter of time who would have claimed it. Luckily, it was Google rather than Facebook.