No. Cash would be nice, but I lost weight for me. Because I wanted to. Getting paid to do so seems to me to not be a good way to go about loosing weight. Unless the amounts are substantial (like 100 times more than what's posted above). Sure, a reward is nice, but if you lose weight for money, you won't keep it off after you get paid.
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Some sort of pithy irrelevant one-liner should go here.