I started comping, mostly via ThePrizeFinder.com, a couple of months ago. I must admit I didn't really expect much to come of it, but I figured I had a bit of "down time" every morning before work and I may as well fill it with something.
A month later I received an email from Entertainment Focus telling me I was the winner of their competition for a Defense Grid 2 Steam key (a PC game) and a Gioteck HC-5 wireless gaming headset - a total of about £75 in prizes! The game arrived a day or so later, and the headset a month after that due to stock problems, but I'm really happy with both. A great win for an avid gamer!
I'm now well and truly converted to comping thanks to ThePrizeFinder, and am looking forward to (hopefully) many more wins!