The Yahoo rug being swept out from under IM'ers running rebill offers on YSM comes as no surprise, given the amount of complaints from disgruntled customers. By "disgruntled", I mean idiots who still don't realize the fine print contains the most important details of the offer. These headline whores will find other ways to throw away their money and smart internet marketers will be there on the rebound to once again collect handsomely.
If you put all your eggs in one basket, this business is like walking a tightrope in a windstorm. If you diversify your marketing methods and offers, that tightrope widens to a walkway and that strong wind becomes a light breeze. You'll stay upright, survive and prosper just fine, regardless of Yahoo or Google's policy changes.
Keep making that money, everyone!