I'm guessing that these codes don't work when you renew. My clear membership expires in May and while you get the discount until mid december to renew early I'm on the fence for renewing it. It's worked well in Denver, although the last few times that I had a flight and went through security the line was not long at all. However, on those few days I did go through and the line was really long it was nice.

Worked well in Orlando as well for a long line.