For me it's simple, historically I've barely played the multiplayer component of a lot of the games I bought, so naturally I have a bias against multiplayer only games. There are exceptions, Rocket League caught me by surprise, but for the most part if your game is multiplayer only I'm not going to pay attention because I'm not likely to play it.

I don't begrudge people who play them at the end of the day my bias only informs my own purchasing decision, I wouldn't start hating on others for supporting those games. I mean it's the same if a company says they're going to make mobile games, I have no interest in that so I move along but a lot of people do. For the most part it doesn't bother me, but when a game like Battlefront comes along, it looks and sounds beautiful, but there's no single player/story element, it's a shame because had there have been I would've bought that game.

Because you can't own a multiplayer-only game.

You just subscribe to essentially a service for like 3 years or 4 years....and it's only good for like 1 year before the community dies out.

Services are great, sure, but it feels like there's something missing. I don't get the same sort of satisfaction buying a MP-only game as I do a SP or SP+MP game.

Because some vocal gamers care only about tradition and not common sense.

I think it's great that we have multiplayer only games now. On average people are putting way more hours into multiplayer games than any singleplayer games so I think it's ridiculous to say that MP only games should cost less. It gets even more ridiculous if you count server cost and the needed continued involvement of the developer. But yeah, let those people scream and everyone else happily pay the price for a good MP only game that they will have hundreds if not thousands of hours of fun with it.

There is the example that Teeqoz provided, but for me its also a more personal issue.I am a single player person.I really dont mind if the game has multiplayer or requires internet all times(though that pisses me off).What I think that almost all games need at least is a great story with a great campain.if the game dosent have that, I feel that for me the game is simply not worth the purchase if you have to pay money for it.Of course there will always be exceptions, but thats the way I see most multiplayer only games.

It's mostly on this site. A lot of people here only enjoy single player campaigns. It's very apparent and it's mostly the reason that you see so much criticism here.

These things only happen if the dev is shit.

I'm a single-player first, co-op second, multiplayer third kind of guy, so admittedly I don't gravitate toward multiplayer only games. However, if the game in question has great gameplay and a variety of modes, then I'm fine with it.

What I'm not fine with is online-only multiplayer games because once the servers are retired it's game over. The solution: just add an offline mode with bots.

But people do complain about single player only games. Personally if the game has the content then it's worth $60 no matter what.

Honestly Im totally fine with the bolded. I know that in 1 - 2 years that Battlefront isn't going to be viable to play anymore because the player population will be very low, or the servers will be offline. 

In terms of SP games, I pretty much finish them and then never play it again.  On PS3 I would beat an SP game and then sell it back to gamestop so I could buy more SP games to play once. My most favorite game is MGS3, and Ive played it a grand total of 2 times.

I don't have any facts to back this up, but I would be willing to bet that people playing SP games years after release are in a tiny minority.  I think that people who post on forums are way more into amassing collections and playing older games.  I highly doubt that mass market consumers are hanging onto and playing Oblivion on their 360s ten years after it released.

I feel "there's not enough content to justify a $60 tag" is argument enough.

If you like MP-only games that's fine, to each his own. Some of us consider multiplayer, specially in FPS games, something that should be a plus/bonus to a game, no the game itself. Again, to each his own.