Huh I wonder why you say they're a scam?

I bought before from Living Social, so far they checked out alright to me.

The Vendor redeemed it without any problems?

I think it boils down to each respective vendor, you can't blame living social directly.

But one thing though, I think you can pursue that vendor who cheated you.

I redeemed legoland voucher + hotel room through living social, the Hotel accepted my vouchers and gave me my lego land tickets.

Mind you I got about 5 tickets.