I remember early twitter thinking RT was some guys initials and was so impressed at how popular and cool he was. Everyone was tweeting him and he seemed to be everywhere
I found that a really interesting development, and they embraced it. Probably the best example of "go with where your users are going" I can think of.
And it's silly as well, because anyone with a few weeks of software development knowledge could probably hack a Twitter-like together. Not that at that scale, admittedly, but still, prototype-twitter was nothing fancy.
Then I learned what it meant.
Never meet your heroes