I am always been curious to how these websites sell so many twitter followers for so little. Given the number, I assume it would have to be bots. Do they just have bots that create twitter accounts and when someone buys they have the bots all follow that person? I usually stay away from these things but just always been curious of the mechantics of them. Which leaves to my 2nd question, couldn't Twitter ban these bots?
I doubt about Twitter banning bots/spam accounts on Twitter. I can see a lot of them. I do actually got curious too about this exchange traffic/like sites and I've tried it out for free. And then lesson learned, that those are just a bunch of junk.
I can't wait for Twitter to do something, like Instagram did - delete all inactive/bots from followers. Bieber lost over 3 mil. followers. Imagine, how many people will get upset on Twitter lol. As for their creation - you won't believe what people are willing to do for a couple of bucks.