At first I couldn't find what you typed, then I realized it was right inside the quote at the top lol
To clarify for you: PS1/PS2/PS3 classics catalog games are all locked behind the highest tier. Though, as kyuu pointed out, no: Game Pass for Xbox ONLY does NOT include XBL. That is only included in the Game Pass Ultimate tier. Thus, you likely have leftover XBL sub that's carried over if you're on Game Pass for Xbox ONLY.
In your defense, it's why I also missed it: I'm on Game Pass Ultimate, and because I "rolled" into it from XBL Gold, I just assumed Game Pass included XBL. I never thought to look at only the basic Xbox ONLY tier to see if it didn't.
To be a little more clear: you really can't call those "rentals" at that point. It is, semantic-wise, simply more accurate to say "subscription". Rental implies individual items, but ALL of the games are part of the subscription service. I get where you're coming from, but calling it "rental" is definitely adding a bit of unnecessary implication where there isn't any. Subscription services have become part of the "norm", now, so it's okay to simply say that the games are part of the subscription, and not that they're "rentals" hahaha
I'm old, you either own or rent :p
Subscription isn't the right term either as traditionally that would be like subscribing to a newspaper or magazine. You get to keep those... I guess ps+ and live gold are outliers as subscription services since you build up your library while being subscribed, like getting a magazine each week/month. However you lose access to your library when you unsubscribe. I guess that's the new way with digital magazines as well nowadays? (I have no idea, but I assume when you stop subscribing to an online newspaper, you also lose access to all the articles that came out while you were subscribed)
So basically we went from subscriptions where you got to keep the periodic content to subscriptions where you lose access to everything you got while subscribed. While the premium tiers are more like subscribing to a bunch of magazines all at once which are added and removed all the time.