Yodlee is the underlying platform, but Mint uses a vastly different front end and may not implement all of the features (including account types) that Yodlee supports. Fidelity, Bank of America, HSBC, etc. all implement "full" Yodlee products (where the interface is also Yodlee, not just the back end), however, and I can tell you from personal experience that using the "full" Yodlee products allows you to add mileage accounts.