I was hesitant to start DietBet, but their site gave me some comfort in that they had a "no loss guarantee." This guarantee ensured you'd at least get your initial investment back if you won the DietBet.
One of the DietBets I signed up for was for charity, and I was happy to support a good cause. After all was said and done, I won, and the amount I won was less than what I paid. Here I am thinking, "I won, why did I not get at least my initial investment back?" Their "no loss guarantee" ensured that.
So I contacted customer support and chatted with them. They brushed it off saying that some money went to charity. I pointed out that even with the amount that went to charity, there was still enough money for everyone who played to get their money back. And according to the "no loss guarantee," DietBet was supposed to take less of a cut so that everyone was ensured they get their money back. They went to such lengths as to change their website to include an addendum to the "no loss guarantee" that prevented charity events from benefiting from this. They then sent me a link to it in their response to the new updated part of their site which wasn't there hours before, but they tried to pretend that the wording that negated charity events was always there. They did all this just to save a very small amount of money!
Such terrible customer service and shady behavior! They can't even stand behind their own policy, probably because they've never had to use the policy until now. At any rate, it's just a terrible company, and I will never use their service again, and I suggest you don't either.
Bottom Line: No, I would not recommend this to a friend