Whenever I join a program, I make note of the traffic exchange where I saw the ad and signed up from. Then, when my new sponsor emails me a welcome message, I email back with the name of the exchange. It seems like most of the time I'm telling them "I saw your site on WebmasterQuest".
I advertise WebmasterQuest on all my websites as simply the best manual traffic exchange. Your anti-cheating system is streets ahead of all the others. In the past, when I had a few problems with your surfbar, I was impressed by your prompt and helpful responses -- even when you thought I might be cheating (which I wasn't!). I really appreciate your hard work and dedication.