So it looks like there was a program that I was unaware of called GOG Connect which added Valve steam games to GOG. Thats pretty sweet. The Project was shut down in 2016 however.

Given that Valve is going to terminate all usage of games on retro gaming systems that run OS's lower that window 11, It would be nice if you guys could bring back this feature. Retro Gaming Enthusiasts like retro OS's.. I would charge a subscription fee for the service to make a profit, and I am sure there are many enthusiasts who would pay to keep playing games they love on their choice of OS and not Valve.

There are almost no chances for it now. Many publishers want more money for two copies, and GOG can't (or doesn't want) compensate them.

Apparently, there was a binding contract with Valve. If you owned the game with Valve, you owned the game in GOG. Connect was discontinued for inactivity. I would hazard to say it was because the focus was on GOG Galaxy and I know I never even heard of it.

If the contract is still valid and legally binding, it could be brought back if there is enough demand for it. This is also why I suggested a possible subscription model. As long as the subscription is cheaper than having to repurchase all of ones games, many would chose that over having to pay to port all their library. Granted a subscription should not be based on library size or what have you but rather to use the service to port to older OS's in a wrapper.

No, that's not true.

Connect always consisted of time limited specials. Once in a while a few games would be unlocked on your account, it was always time limited and always only a few selected ones.

Valve has nothing to do with it, GOG basically payed for the costs and the publishers had to agree, not unlike the EpicGames freebies, with the difference, that you had to have bought the game on Steam.
GOG did this to get customers started who switched platform.

I probably got less than 20 games this way, some old DOS games mostly which you can get now during sales for a total of less than 30$.