Does trade-in require DirecTV stream?

I bought a iPhone 13 pro with trade-in my old iPhone XS at an AT&T store.  The sales person told me that if I want to get $800 credit for my old phone I have to sign up for DirecTV stream which is about $70/month.  Do they really require this?  He told me I have to either add another line or sign up for DirecTV.  The my AT&T website doesn’t seem saying that.