This has been discussed before. XT is an altcoin, and services that move from Bitcoin to XT are altcoin services. On bitcointalk.org, altcoins and altcoin services belong in the Alt Cryptocurrencies section. On /r/Bitcoin, altcoins and altcoin services aren't allowed.
Promoting XT and moving to XT is not the same thing.
That would be like banning a service, because they consider moving to another altcoin, even though they are still using Bitcoin.