xkcd: Instagram
I disagree fundamentally with the message xkcd is saying here. Instagram, facebook, myspace etc all gained traction as basically setting up a website or wordpress site was just not practical at one time. They all give the impression that it's a practical and reasonable alternative. And that's what 99.9% of their users think.And then of course the funding starts to dry up and the  accountants start needing to see some hard $$$$ income. And that's when the ToS start to "adapt" to enable aforementioned sites to monetize "their" content. Oh didn't you know ? It's not your website after all. Sorry ! And thanks for getting your friends on board too !!