WHY is "YT" or "YouTube" DISALLOWED??

I understand the reason for certain disallowed words, but I can't use: YT, YouTube, You Tube, Tubes of You, or even ONLINE.  I stopped added the link to my channel, but why can't I just say "Find me on YT [channel name]??? This doesn't make sense to me. Does EA NOT want us to do this? It's not like EA would be losing traction or anything. I don't get it. Can someone please explain why???