Kind of, but in practice not really. Usually when I want to invest any amount of time in a game, I expect it to be good enough for me to keep it (I'm a bit of a collector). Renting first and then buying doesn't seem like a smart thing to do when you want to keep a game though, so I probably wouldn't rent at all. It should be a good option if you don't intend to keep a game after completing it though.

Problem with me would be time, don't have time to concentrate on a rental title during a specific period.

Buying a title I am interested in and playing it when I can is a more effective way to game for me.

GP and PS Now have very few games 

Sure. If your timer starts after purchase and download...

Based on game time only.

As others have said though, there are better options available already.

No.

I had the chance to buy Jedi Fallen Order for 25 bucks or having EA Play with Fallen Order in it for 25 bucks. I got EA Play, barely played Fallen Order, and the other games weren't interesting, and now I can't even play Fallen Order anymore without paying 25 bucks again.

Worst decision ever

Only few games are on services, for the majority of them you need to pay before buying and you have no option for testing. 

It's not target only towards people who subscribe to services, Gamespass isn't the majority even among Xbox users 

Depends on the renting price. Renting a game day one and buying it later on sale would be often cheaper than buying it day one.

I have played a lot of games in a subscription and when they left that subscription they already were very cheap to buy on a sale.

Some games I played on GamePass when they were new and even before they left that sub model, I got the unlimited licence for free from Epic or as Amazon Prime game or in a Humble bundle.

Many digital stores offer testing a game for a few hours. If you don't like it in that time frame, you can give it back and get a refund:

• Steam: return within 14 days from purchase, playtime less than 120 minutes
• Epic Games Store: return within 14 days from purchase, playtime less than 120 minutes
• GOG: return within 30 days from purchase, no playtime limit!
• EA Store: return within 14 days from purchase; within 24 hours after you first launch the game
• Stadia: return within 14 days from purchase, playtime less than 120 minutes
• Battle.net: return within 14 days from purchase, playtime less than 120 minutes
• Xbox Marketplace / Microsoft Store: return within 14 days from purchase, "not much" playtime

More restrictive return policies:

• Ubisoft Store: return within 14 days; as long as the content hasn't been launched
• PlayStation Store: return within 14 days; as long as the content hasn't been launched
• Nintendo eShop: "No refunds, suckers!"

There is just so many games available everywhere and so cheap that why would I spent money in renting a game when I can simply buy other great games for the same price? The original game will end up being in a sale anyways and then you have things like Gamepass...

That's definitely a fair point. Still doesn't particularly apply to me, since I typically get my games way after release anyway, but for someone who wants to play at release, this actually seems like a good option.