I've been using Bing Ads for about 2 1/2 weeks, now, and the only frustration I have with them, is that they keep randomly disapproving my ads, which gets annoying, after a while. I've not tried any coupons, as I feel I will take things more seriously when investing my own money, but to each their own. Those shared coupons may be the cause for the bannings. I'm fairly certain they frown upon sharing coupons amongst multiple users, but I digress. Bing Ads is pretty cool, thus far. I've made some money. It's the optimization part that has me a bit bummed, at the moment. Once I get a handle on that, I imagine there's a bright future ahead.