I mean this might work if you were really into multiplayer games and didnt mind jumping to new games every week or two. When I buy a game, I play it for long periods of time. I bought project wingman and have sunk over 30 hours into it, finally staring to get bored of it. That's a relatively short indie game that only cost $25. I fit the description you have, someone who only has a handful of hours to game any particular week, and even then I'd spend much more on a $15 subscription then I would on just buying the handful of games I want per year on sale.
On console it may make more sense where games are $60, but on PC where sales are common and you have competition (not to mention a 30+ year backlog of older games for under $10, like fallout NV, the OG mass effect, star wars battlefront, supereme commander, old NFS and burnout paradise games, ece) the price honestly makes little to no sense unless you want to constantly swap games. I know people like that, but they are the type to dedicate 4-5 hours a day to gaming on weeknights and 10+ hours on weekends, and can complete entire games in less then a week. I cant think of anyone with limited time on their hands to game who also want to jump between titles constantly, you'd never be able to get into a particular title.
Most of the people I know who enjoy games but have limited time to play them usually stick to 1-3 games over the course of a few years, like skyrim and halo, or fallout and forza, or something like that, because what is the point of having hundreds of games at your disposal if you never get the chance to get into them?
