1) How much time does it take for Google to de-index deleted content n this forum ?
It looks like they were deleting the posts just before reposting them so that's not such a big issue.
another new method used by account farmers to abuse the system eh?
since those accounts already high rank, they don't care about total activity and rank up
but they are trying to maximize their weekly earnings (weekly post count) by reusing old post
that sounds smart but very unethical, it's going to be very hard for campaign manager to monitor and catch this