As Google's share of American web searches rose to nearly 62 percent in April, Microsoft has unveiled its latest effort to find a way to compete: free money. As part of the company's new Live Search cashback program, customers that buy certain products they find using Microsoft search tools will get a rebate of between two and seven percent off the price. If you detect whiff of desperation lingering in the air, you're not alone; Alley Insider's Henry Blodget reports that Microsoft will receive absolutely no revenue from the cashback program. The company just plans to bleed cash if that's what it takes to claw its way back into the search market. When news of this new marketing gimmick hit the world, Google closed the day with a five percent drop in its stock price. Microsoft must have done something right.