That's a nice straight forward business model most people can get behind.
The problem comes later, as it does when any company gets big enough. Few years down the line, the board of directors has a look over the company and see's a big opportunity: all that data you're flowing around can be turned into money with some very clever thinking at 'no real loss to anyone'.
People don't like to leave money on the table if they can just find a clever enough way to put it in their pockets, and more than enough very smart people saying "hey, pay me a little bit and I'll get all that nice money off the table for you - nobody will mind, privacy is dead anyway!"