25% is ~50 million people. Also just because 80% of tweets are retweets, that doesn't mean only 20% of them are tweeting original content, it's probably a mix.

25% is ~50 million people. Also just because 80% of tweets are retweets, that doesn't mean only 20% of them are tweeting original content, it's probably a mix. So realistically we're looking at tens of millions of people forming the core contributor community. Hardly a small elite.