Thing is: lots of credit card companies base their interest rates to you on what the interest rate the fed issues.
LOL! I have no idea what credit card base their rates on but it's certainly not the Fed rates. If they did all these come-ons I get on a daily basis would not be offering me cards at 16.99% or 26.99% or God knows what interest rate. They may use it as an excuse to jack their rates even higher but that's about it. It will impact mortgage rates though.
Show me a credit card company not charging 29.9% already.