Yeah no don't go on the "revenue vs profit" debate, I've read so much nonesense about it (my favourite one being "it's hard to calculate accurate profit" cause MS accountants are less competent as Sony's or Nintendo's I guess)
MS is hoping that its shift towards gaming will eventually make money in the very long term. And I hope they will, the value is great as a complementary on what we currently have.
Spencer said a few weeks ago in Larry Hryb's Podcast that the Gaming division is profitable. Microsoft doesn't give profit figures for every product or service, only for the full divisions. So basically we know the division Gaming is in is very profitable - as per their last report - but we can't know the exact profit of Xbox and the other products within that division.
Nadella also said Gaming is "very profitable" in their last report but yeah we don't have exact numbers.