p4l4clin: I'm curious, who get's profit from abandonware? To be more specific, if I buy game on GoG which is available on internet for free as abandonware, will Interplay Entertainment still get part of that money? Or all will go to GoG?
Well, GOG is the retailer of certain games which appear on its site only. They go through the legal process of acquiring the legal right to sell a game from the IP holder, and the IP holder then gets a cut of the price.
Abandonware is very different. Most of those sites get income from advertising, they don't "sell" anything themselves. They also very rarely have any right to distribute the games, nor does the IP holder ever get anything from this.
So to summarise, Abandonware is technically illegal, and does occasionally get followed up and closed, but mostly just borders on the grey areas at the edge.