Microsoft's latest effort to get people to use its search service is something called SearchPerks, which gives people points for using the search engine that can later be redeemed for prizes.

Users who agree to download a small program to track their usage get one "ticket" per day for every Live Search query, up to 25 per day. The program runs through April, at which point users can "cash in" the tickets that they get and trade them in for prizes or donate them to a charity.

It's the latest in a series of financial incentive-related projects from Redmond, joining such efforts as Live Search Club, Search and Give, and Live Search Cashback, a program Microsoft introduced in May.

The latest project doesn't just require one to use Microsoft's search engine, however. At least for now, it also requires Microsoft's browser (Internet Explorer 6.0 or higher) as well as a Windows PC. Microsoft said those latter restrictions are not necessarily permanent.

"At this time, SearchPerks is a limited promotion, though we remain open to expending availability of the promotion to different browsers and operating systems based on consumer interest," Microsoft said.

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