There are some games that are social and multiplayer by default. MMO games, clearly, and first-person shooters based on teamwork. Even if the bots were awesome, I’d still prefer to enjoy battlefield 4 with real people. But conversely, there are some game designs and genre that are absolutely firmly SINGLE player and NOT social. City builders are one. Almost all turn-based empire games are another. Single-player games have a lot of plus-sides. You can play when YOU want to, Nobody can ‘ruin’ the game for you. You don’t need to have lots of friends with similar interests. If you get bored, you just quit, without spoiling anyone else’s fun.
It all feels interconnected. You do something that takes away from an experience for an ulterior motive or purpose to suit your own needs as a company.
I'm not really into multiplayer games. I can enjoy them from time to time, and it adds a dimension of challenge and a different perspective on a game or its fanbase, but I have never felt immersed in a multiplayer game like I have in single players. I sunk 200 hours into Fallout between Fallout 3 and New Vegas. Do you know what I felt during those games? Terror, desolation, awe. I remember having chills the first time I walked out of the Vault and saw the wastelands. I have never felt so empty and alone as a person than when playing those games, and that's fantastic. I was absorbed, and this has happened in other games as well, where I am in that character and that world and there alone. I felt it playing GTA IV; I did not playing GTA Online.
If I had gotten a gun for, say, tweeting about the game, there isn't a doubt in my mind that this effect would have been ruined, because that gun would be always be an artifact of this world. It's something that even if I were not consciously aware of, would still make it fundamentally different. If I had to get emails about the game through a DRM system, or I logged in because they're trying to prevent the experience from being stolen, these additionally break the illusion.
There's nothing wrong with game companies trying to make money. I know they already exist on a razor's edge of profits, but have your Farmville and have your Fallout games separate, and especially don't go pulling something like Gran Turismo did today where I am made acutely aware that everything you're doing you're doing for money. Some gamers are truly dedicated to the craft and the world-building, not the perpetuation of a company. Besides, I'm a strong proponent of taking care of your fans. Yeah you won't make as much now in terms of profits, but you'll make a hell of a lot more in the long-run from word of mouth, new fans, and dedicated supporters. Take the Amazon approach.