Stream saver

I use the links to active each of the 3 services. Then when I try to log in to the services it’s asking me to choose a plan then asks for my credit card information for each service. If I’m being billed by xfinity, then why would I enter my credit card. I’m worried it’s going to bill me for each individually. How I use these services without signing up for each one? It will not allow me to just log in.