To some of us (me) the service Mint provides is well worth letting some marketer know I spent $50 at Walmart yesterday, that's not sensitive information to me, and if it were I'd be paying in cash.

I even gave the transaction history of all my credit cards directly to Drop (https://www.earnwithdrop.com) in exchange for a few dollars, that's how little it means to me. (So far around $30)