I mean, if a game publisher wants to try to offset the game price via adding advertisements or to try to market the game via your social network or whatever, fine. I’m not going to try to tell game publishers how to do their business.
However, as a game consumer, I’d like to be informed before I buy a game whether game publishers are doing this in a game before I purchase it, so that I have the opportunity to opt out of buying it. Personally, I’d rather that they at least offer a “premium” version without stuff like this; the mobile video game industry often does an “adware and a premium no-ads” model.
Steam defaults to notifying people on your friends list what games you are playing, though they let you turn it off. I doubt that any user wants that on, all else held equal, other than the specific case of multiplayer games where users play multiplayer games with their friends. It might help a game publisher market their game to other users, but I’d rather just pay whatever extra it takes to make up the difference. I’m not going to say that it’s worth it to every user to pay a little more to maintain game immersion, but it is to me.