Logged into my Juniper account this morning and they raised my APR from 8.99 to 14.99 without even a faretheewell. Really ticked as this was my lowest APR on any of my cards. Am dreaming of the day when I can kick them to curb and tell them your standards dont live up to my credit score. 
Hang in there Chris. By kicking them to the curb you might be biting off your nose to spite your face. Do you have a balance? Do you PIF? Be sure and weigh the positives that the account adds to your score vs. the negatives that the reduced CL may have before kicking them to the curb.
Starting Score: TU 737 EQ 721
Just remember the reason you obtained the card, what its purpose is. And then adjust its use with the circumstances at hand. Don't carry a balance and the APR isn't an issue 
And debt free is the way to be!
And debt free is the way to be!