If there are not exclusive games coming to stadia, then yearly subscription should be 50 dollars on par with geforce now or max 60 dollars. It’s not worth it paying that much, geforce now has rtx also for just 25 dollars for 6 months.
True, a yearly subscription would be nice for a reduced price.
Maybe you can forward this to the Stadia developers by submitting feedback? I think that would help.
Just tap your profile picture in the top right corner on stadia.google.com or in the Stadia app and select "feedback".
The fact that Stadia Games & Entertainment is going to close doesn't automatically mean that we won't see any game exclusives, since Google can still partnership with external studios to make it happen!
Also Stadia pro offers more than GFN, I think the two service are not directly comparable, since on GFN you pay (or if you like long queues you can also not pay) to play games you already own on steam, while Stadia offer a way to play games that you don't have without the need to buy both the game and the hardware, the scope is different, the target also, another things to be aware is that on GFN they removed games without notice and you were not anymore able to play, while on Stadia you have the guarantee that even if the game is removed from the library you are still able to play