i'm a regular on Yahoo! Answers and come across a very suspicious activity.
I have no idea how to stop this as it's somewhat sophisticated, too sophisticated for Yahoo! or most forums/sites to spot. and frankly, Yahoo make it impossible to report anything to them.
I have come across people asking certain specific questions, ones that will show up in a search or search engine, Eg 'how do I recover files', the asker will add key words so it's more likely to come up in a search online, and then after a few days they will get an answer, that always seems to be very similar to others I've seen, recommending the same paid for software and site they may be spamming.
I have also found people linking in the same way 'cheap Microsoft codes' or keys saying 'they bought off of the site' and 'trust it', when in-fact it's a scam site, one that usually only just gets set up a few hours, days or weeks before.
they then mark the answer as the best and comment it 'thanks, it's worked, would recommend to anyone else in the same situation' or something similar.
these are nearly always new users
so how do you go about reporting or doing anything at all about these?
Yahoo aren't exactly the easiest company to contact, I doubt they would listen anyway.