

It pretty valuable even if you don’t change it. He can see what his competitors are being paid. He can correlate it with Twitter’s user data to tie political enemies to physical addresses and more.
Not that they won’t corrupt it. They will almost certainly alter it to their own ends as well.
Yep. After you ban all the easy to spot ones you’re still left with far too many hard to ID bots. At least if your site is popular and large.