Paypal was pretty revolutionary for its time. Not quite "cool sci-fi shit", but close, in perspective.
My point remains that we shouldn't be so quick to judge the altruistic intentions of entrepreneurs based on their first ventures; it may be a means to a more noble end. I'm sure many, if not most, aspire to contribute more to society beyond photo sharing apps. In fact, PayPal was voted one of the worst companies when it debuted, so I'm willing to give everyone the benefit of doubt.