How do you shut down a business that has DRM of a certain nature? 5 years later a product you purchased can't be 'authenticated' because the company that made it shut their doors.
It is not as bad as you making it sound.
In case of updates - there will be no more updates, so the concern is moot.
If it's a MOO (not an indie title usually) when it shuts down it shuts down for good - we've seen a number of examples of this, my personal favourite was Hellgate: London, I was really upset when it went belly-up. But this happens and this will keep happening. That's life.
Take SpaceChem. They did shut down online services because they can't support them any longer, that's the research-net with user submitted puzzles and online statistics. Again, disappointing, but that's happens.
Some companies make server-side components available when they shut down, so that people can continue experiencing the game if some one can set the online component up.
Hell, even if the
do not shut down: One of my favourite games
King's Bounty used to have most draconian DRM I've ever seen (barring always on, it was before the always on time. By the way, who pioneered always on? I *think* it was Ubisoft, but I'm not sure with what title they did this). King's bounty used
StarForce. If you don't know StarForce eats babies. It does stuff like suspending all processes on the system for a few seconds when doing checks so that no process could interfere. A kernel driver is also installed that has been know to cause problems with other software. This all sucks, but I liked the game so I had to put up with that. But you know what? In about 1.5 years after the release, when they were preparing to release a
sequel, they made a patch, that
removed DRM completely. They figured, that they are not going to do patches any longer, and that getting more people to see the older game will set them up good for selling the sequel.
So, some people when shutting down find ways to make their game available to people, after all by that time revenue is usually no longer a concern - there won't be any anyway.