If we allow you to buy "facebook-only" service which only serves FB, Twitter, and related services...what happens to Gnusocial, which isn't on that list? By per

If we allow you to buy "facebook-only" service which only serves FB, Twitter, and related services...what happens to Gnusocial, which isn't on that list? By permitting discrimination by content, you are implicitly allowing an ISP to cripple services at their discretion. Perhaps a better example: would it be fair for Comcast to cut any connection to AT&T or Time Warner's sites?