I think they did. There were a few game releases where they included a later version with all the dlc that others paid for. They just got mad because they paid for something that others how free
You’re right, Oblivion definitely had a special edition with the horse armor and everything included ages ago.
I was thinking more along the lines of the games where you can use real money in place of in-game money. Like all of those “live service” games.
There are several TF2 mods doing that and Valve is just quietly refusing to put them on steam because they’d hurt the hat economy.