They shouldn't use libraries that don't allow them to release a server at the official game's sunset. There's been a lot of rhetoric from the publishers about "developer choice", which is really publisher's choice, but that's the whole problem. They are choosing to make games with a hard shelf life, and that's contrary to the copyright regimes of most jurisdictions that have some sort of eventual public domain mechanism. What's the use of a public domain if the work is intentionally destroyed by that point. I consider that theft from the public, in a way that mere copyright infringement can never equate to.
They shouldn't use libraries that don't allow them to release a server at the official game's sunset. There's been a lot of rhetoric from the publishers about "developer choice", which is really publisher's choice, but that's the whole problem. They are choosing to make games with a hard shelf life, and that's contrary to the copyright regimes of most jurisdictions that have some sort of eventual public domain mechanism. What's the use of a public domain if the work is intentionally destroyed by that point. I consider that theft from the public, in a way that mere copyright infringement can never equate to.