So it looks like BankDirect has all sorts of Mileage account types. Checking gets you .1miles/$1, and money market gets you .05miles/$1. The interest is double for the money market (.1% vs .05%). Both of those are worth next to nothing compared to the miles. However, you get 1K miles/account opened. So would it make sense to open up a money market and a checking account, put the minimum funding in the money market, and the rest of my money in the checking? When could I close out the money market?