Interesting optimization idea: If 95% of the users are bots, and your ML algorithms are smart enough to figure who's bot and who's bio, you could save a lot of traffic by not publishing tweets to bots as no one is going to read them anyway. Of course if that traffic included advertisements, you'd also lose 95% of your ad revenue.

The ultimate extension of this "run it all on one machine" meme would be to run the bots on the single machine along with the service.