If a company wants to do trials, that's fine. But it cant be that hard. XBLIG had I think 10 minute trials for all games (I forget, maybe it was 12 or 15). If 3000 XBLIG made dirt cheap by guys in their basement, it cant be hard for bigger companies and bigger titles to implement a trial that is standard and works right.
Now if only Sony or MS did something like this standard across all games. It doesn't have to be customized demo (which supposedly eats up money and resources).
Just make it so gamers download a game, and when they start playing it, you get 10 minutes or 1 hour to mess around with it. And then it's deactivated. Demos are different where a gamer can mess around with a demo forever. And some demos had some decent content in it.
Who knows, maybe it's a bandwidth issue. Sony and MS realized if you do trials and demos during the 360/PS3 days, too many people were hogging downloading demos it killed the servers.
If they implemented that now, it would be a disaster as everyone would queuing up demos and trials from 30 games at once. Whereas back then, demos came out bit by bit every month so people downloaded them spread out.