That seems like a really cool concept. But also way too free. How are they making money? Their privacy policy (which was hard to find) doesn't describe how the

That seems like a really cool concept. But also way too free. How are they making money? Their privacy policy (which was hard to find) doesn't describe how they handle your transaction data, yet almost half of the policy is describing how they're going to collect and disclose (web) information for advertising.