If a Lemmy-naut is registered with an instance that’s defederated from the game company instance, they can always register at an instance that is federated, either in addition to their main or to replace it. The company’s instance would likely act as an info hub, but the gamers wouldn’t be members of the instance directly, so it would be like any other content that could be opted into. If it became the norm that games or game companies spun up their own instance, it could become a community and marketing tool for the games. But even if the instances themselves retire, the content made is still around and the existing fans could just start channels to continue the community. Companies that arent complete assholes could even assist with transfer to new channels elsewhere.
I think theres an opportunity down the line for a company/companies to form that specialize in helping orgs to spin up instances and sell their them hosting. Hosting is expensive for small groups to manage, but multiple small groups together could make it viable. Plus having the hosting coupled with help overcoming the tech-knowledge barrier could lead to more orgs feeling comfortable spinning up their own instances.
It solves #1 as well because the Lemmy-phile/end user is already apart of an instance that would federate with the game instance.
Administration is taken on by the game company for their own instance, so updating and technical, server side stuff isnt a worry for the end user. As far as the instance owner, its no more difficult to keep updated as it is for other instances. If anything it would be easier because only the devs and company folks would be users of the instance itself so an update doesn’t impact their user base directly, there might just be a pause in new content while it was updating