It's crazy how they have the time to participate in that many campaigns. They probably use bots because it's just physically impossible to handle that much accounts in several different ICO/bounty campaigns. It would have been fine for people to earn from bounties but this has made others spam everywhere (not only in this forum but in other forms of social media such as "tweeter") and they have taken too much advantage of this earning mechanism.
I am not malicious enough to develop such a system but I can guarantee that there are people out there who use scripts/bots to automatically copy and paste answers from one thread to another where there is a similar topic or question asked. And they are likely doing a crappy job. Wink I would atleast use a NLP algorithm to 'paraphrase' the answers. (lots of them out there)
Fortunately accounts doing this can be easily tagged over time, though the benign forum crawling limit will means it will take awhile.
When I am done wallowing in a little depression after my team at Oyster mutineed on me (still love you guys) and get back to the bitcointalk visualization project we should definitely add this to the shitposter modeling tasks.