There are three regions in the game, The United States, Europe, and Japan, all with their own unique categories of racing. (macgamerhq.com)
These are treated as their own unique category especially due to the way they're treated by the US Federal Government. (glassridge.com)
Shipping and advertising, in particular, are two of the more unique categories we've seen credit card companies issue bonus points for. (valuepenguin.com)