As far as publishers are concerned, the single greatest cancer they face is the resale market. When a store sells a new game for £60, the publisher makes about £20, and the store gets between £15-20, depending on how they choose to price it. The rest is the cost of manufacturing and shipping. (These are rounded estimates, it varies)
Then, a week later, when someone trades that game in and the store resells it for $40, they get all of that, and the publisher gets nothing.
From their perspective, that’s basically theft, which is why they’ve been trying for decades to put a stop to it, which they can’t, or at least make more money from secondary sales by bundling single-use codes for “bonus” content that really should be part of the main game, which people who buy preowned will have to shell out extra for.
So that’s what getting rid of physical media is all about. If they get rid of the discs and cartridges, that market vanishes.
Please don’t mistake this explanation as an excuse. All of the platform holders have had the means to kill off the retail market and usher customers onto their digital storefronts for at least a decade. All they had to do was pass on even a fraction of the savings they make selling digitally, which cuts out the manufacturing, shipping, and retailer costs, onto the customer. But they haven’t. Games cost the same on the Playstation Store as they do on the Gamestop Shelf. Sometimes more!
They could have used the carrot, but pure greed means they’re now opting for the stick.
Edit, Supplemental Question: This is my first post on Lemmy, and the responses have me wanting to clarify something- Is everyone on this platform fucking mental?
That was a small minority of games. There were video games before everybody had the internet. But even later, not every game is or was an online game. Actually most weren’t, because plans were expensive and connection quality was horseshit. Also, games used to support player run dedicated servers where no such checks existed. Hell, you didn’t even have to use the game’s own server browsers in many cases, there were 3rd party solutions for that.
There were actually a lot of online games back in the day since lan was pretty common, but your point is mostly valid. Unless the game had online features the cdkey could be reused.