Nothing, really. I tend to become quite friendly with well-known users or moderators in various websites I've frequented in turn over the years. Never been given any kind of mod position, though. But then this is probably the first website I've frequented enough to feel like I could do such a thing.
In any case, I was never a fan of making Youtube videos, though my friend has ideas for things that never take off every month or so, and usually attempts to recruit me... as for blogging websites like Tumblr, I'm too inactive in my day to day life for that to be any good. I tend to amaze people by using my novelist skills to ad-lib movie plots. For instance, on Omegle, in the question mode, we were asked to roleplay two lovers, and so rather than disconnect, or give the weirdo what he wanted, I just went from there and started riffing and turned it from a love story into a psychological thriller. The other stranger was very impressed.
I'd say I'm good at it, but I never garnered any sort of real notice.