You cant accuse that yahoo is promoting the copycat forum (girlbtc) just because he applied to be a moderator there. You can say that yahoo promoting the forum if there is a thread/post made by yahoo to promote it here in this bitcointalk forum. I did not find any posts by yahoo which is promoting girlbtc, did I miss something?
Just my two cents but moderating does not mean promoting, in this case yahoo did not say anything to promote girlbtc.