I have an airline credit card, I put 75k on it last year... (and almost never carried a balance, its zero right now)
I now have enough airline miles to get 6 first class tickets to anywhere...
Its like free first class tickets just for channelling all my purchases through the AMEX
but there was a time where I had over 50k in cc debt... sometimes life gets rough, ad you gotta let someone else pay for stuff for a while...