Well, the bigger ones could probably afford to take an existing open source/free model and fine tune it for their use case with more training. Then run it thems

Well, the bigger ones could probably afford to take an existing open source/free model and fine tune it for their use case with more training. Then run it themselves in some cloud (they already have some experience with servers after all). Many users' GPU's are powerful enough to run models locally, but the rub there is that you can't really run the model at the same time you're playing the game normally, unless you want, like, massive frameskips.