Rikafip, here are a few more candidates to add to your list:
A bunch of newbies trying to bump up topics with a fake interest in projects.
Damn, nice catch. An obvious case of thread bumping and I would really like to see the way the still manage to sell this service to naive clients that think this kind of promotion actually works. Gonna update the first post either tonight or tomorrow, as its going to take me some considering that your identified 20_+ ANN threads.
