Living Social takes $10 off orders of $50 or more via coupon code "EARTH10". It's the largest dollar-off discount we've seen from Living Social since November, when we saw $10 off $30 or more. (We've since seen coupons for $5 off $15.) Some conditions apply. Deal ends April 23.
I don't think they're a ripoff at all. I've tried a couple of deals, and I've had nothing but good things out of them.