TV and phone are two services both provided over one or two strands of copper, and each is taxed at a different rate. Is social media not just another service? Sure, it's built on TCP/IP, DSL, & DOSCIS, but cable TV is built on CATV and phone on ISDN.
If it is absurd to tax a social media service coming down the wire, then it is equally absurd to individually tax cable TV or phone service over the same wire. Yet, we hardly see that as absurd, we've been doing it for decades.