The ability to buy and sell used games is really nice. I can get a game that came out a year ago second hand for like $15-30 in some cases. Not being able to do that for digital exclusive games is really annoying and often means I just don't play them.
Does the cost of buying and reselling games for slightly less end up equaling out to the cost of a games subscription model? Maybe, but my concern is fragmentation. I definitely can't afford more than one game subscription so I don't like this trend.