The part where it gets weird though is that twitter already has massive botnets which run around in it retweeting things and what not. Which they do not shut down. So is that because they don't want to? Because they can't? or simply because it isn't worth their time? That is still an unresolved question for me.
Some are shitty, but that seems considerably harder to detect.
Then you can double dip - sell what the content of the command/abort messages are (or just allow for 'padding' messages for advertising in between) and suddenly your botnet doubles as a completely legitimate social media firm
Super bonus round: Launder your money from botnet activities through the social media firm's books
(I am, of course, kidding)
Spam botnets ain't nothing new. They'll ways be around.