I never gave a credit card number since the trial came with the car. There's no way for them to start charging except by mail.
Does the 6 months for $25 include internet streaming?
Internet streaming is extra and not included in the $25/6 months. You should be able to get the $25/6 months. Just call them when your trial is about to end. I would just tell them it's too expensive and you heard about $25/6 months.