Not even sure what it is but charges started showing up on my credit card. Wife says she signed up but didn't fully understand - thought it would give shipping discounts. It doesn't work that way - you need to do the work, submit bills etc. to get rebate cheques. I think their business model is to make money on subscriptions hoping that it takes several months for people, like us, to realize that it isn't worth the money unless you do a lot of buying from companies that don't do free shipping. Even then, though, you need to be really organized to go through the process of submitting bills, etc. to realize rebates that might go beyond the cost of the subscription.