The thing with DRM is that the luddites in these old companies (movie studios, publishers, 80s/90s gaming companies) are too stupid to realise that DRM doesn't do any good. Show me any supposedly "protected" digital product which has not been pirated. Even things like Cubase, which required a physical dongle that plugged into the parallel port, was pirated.
I have a ton of games on Steam, mostly bought during Summer and Christmas sales, but it's still a lot of money invested in something that could be taken away. To make matters worse, companies like EA and Ubisoft then bundle their own DRM on top of that used by Steam. People like to be pacified by believing that there's some magical DRM remover that will be released if Valve/Microsoft/whoever goes bust, but that will never happen. Not only would they never be able to legally release such a tool, but what do they care? They're bankrupt.
Then on the other hand you have GOG.com, who offer games without any DRM whatsoever. The biggest music services are now DRM free. All of these have remained in business without restrictive DRM. Movie studios are so backward I don't think they'll ever change - you only have to read the leaked emails from Sony to realise how genuinely stupid these people are.
How long before Sainsburys shut down their service? Or sell it on to somebody else, stealthily removing things during the change of ownership due to "licencing hurdles". Nobody except Amazon, Apple or Google seem to have a particularly good track record of keeping such services running long-term.
