(Probably mentioned several times already...)
Tenebricus: Does that mean that actual developers, who made the game in the first place, no longer gain profit off said game?
Probably so (in case they are not the current publisher or IP rights holder, like usually is probably the case with old games).
And I think that is perfectly fine. You should think of the developers as employees, and the publisher as their employer. Let's say I developed a piece of code to some company 10 years ago (for which I am not even working anymore), and that company is still making some money from that piece of code. Should I get a cut from that profit, along with hundreds of other people who worked on that product 10 years ago? I feel not, I was paid for my work already back then, and that's it. I accepted a deal where my employer keeps the rights to that piece of code I made, and they can continue make profit with it. Fine by me, I'm being paid by someone else now for my current work.
Or think of movies. An old movie like Robocop is still making some money from various sources, I presume. Should everyone, who ever worked for that movie in the 80s even a tiny bit, still get a cut from every source of income? Like the people who did the lighting, or audio editing, or casting for the movie?
You must also remember that even if the original development studio was still around and was indeed getting a cut from all their previously developed games, how about the fact that the staff of that studio has certainly changed over years? New people have joined the team that had nothing to do with those old games, while many of the people who were working on those games have retired, or moved to other jobs. If the point is to give a cut to the developers (not the development company only, whoever owns it nowadays), how do you arrange it, and make it sure it goes specifically to those people who worked on the game?
I personally feel it is much more straightforward and sane that the current IP rights holder gets the profit. If the original developer(s) still own the IP rights, fine. If they agreed to give or sell the rights to some other people/company, their loss and their decision.
Tenebricus: It was about rewarding specific people for their amazing creations.
JohnnyDollar: They were rewarded when they developed the game. Their paychecks were cashed a long time ago.
This. In one line what I was trying to say. :)