So one of the Weekly Time Trials this week is a bunch of NASCAR cars at Indy.  All of the cars say Buy, Rent, or are locked.  I have 4 or 5 of the NASCAR racers, some of which look exactly like the ones in the TT, how come I can't just race one without buying or renting?  Have they added that many more NASCAR bricks?

If I just ignore this race, that's 4 weeks I'm out of the TTs, but I'm not excited to buy another NASCAR thing just like the other 4 or 5 I already have.