I know by the title this may comes off as a troll post, but in fact it is exactly the opposite. In a time long past, there was a huge stake in what company was attached to an MMO, in modern times it seems many do not even care about the "face" behind the game, but rather just the feature list and payment model.
At one point there was a veritable pick of developers who had name recognition, but now you dont really have these great innovators or names that are pushing the games forward. Although its not an MMO, Chris Roberts and Star Citizen would be the only relevant modern example I have of a name behind the company actually enticing people to purchase a game.
Now on to the idea of trust. I feel, and again this is just my opinion, that many players feel "burned" by alot of the big name companies and have generated a large amount of mistrust between them and the developers. This goes for the publishers as well, NCSOFT is a prime example in my opinion from the closure of alot of games that although had small fan bases, wernt generating the mega-profits needed for continued support.
Then you have the buyout of many MMO's by foreign developers, for example Cryptic Studios being bought by Perfect World Entertainment a Chinese based company. There again generates alot of feelings of mistrust, whenever a foreign entity now has ahold of a Western product, because of the obvious disconnect between languages.
Also you have developers that implemented new business models, such as Champions Online going F2P, Age of Conan, Wildstar, among others. You also garner from this same vein companies that have ridiculous Microsatction fee's like Goblinwork's Pathfinder MMO, or Shroud of the Avatar with their in game houses that sell for $200 a pop.
My point is, there seems to be a large focus now on a few things, Hype, Profit, and Paid Testing. It seems like a large gauntlet for the consumer to traverse to actually connect with a developer they can trust. So on a serious note, Is there a developer or publisher you trust? Or even continue to Trust? Why has this company kept you with them for so long? And if not why have they led you away?