On the subject of colluders in online o8 games

[wiseheart]

So, Ive played approximately 500,000+ hands on Pokerstars (possibly more, but last time I actually got the official # from them it was a bit below 500k) and I have only now received my first email from Pokerstars which says I was a victim of colluders and received a (measly) credit.

Now, I have never taken the time to scrutinize sufficiently whether or not my opponents were colluding. I have been at tables where it seemed that way and expressed verbally that I would contact Support and once about 1 year ago I actually asked support to look into two people, but they found nothing.

Anyways, is this a sign that colluding on Pokerstars is fairly rare, or is it just fairly rarely reported? What are your opinions?