Regarding stickiness, perhaps it’s because the internet is ubiquitous now. Fifteen years ago, those of us on Fark and Digg and Reddit came to the internet for a lot of things. Notably, we kept in touch with friends that way (MySpace and Facebook) and in particular, we got our news that way. My parents were incredulous forever and still kinda are that I “don’t watch the evening news.” Now everyone uses it for everything. The big difference is that the early adopters are naturally more open to change because they adopted something that was a change. The rest of the population was slowly pushed into it. Now they don’t want to leave the sites that they’re used to (e.g. Reddit and Facebook) because they aren’t that open to change in the first place.