Some people seem to be interested in whether the DOSBox crew benefits from being used by GOG by either money or code.
We don't, but that's no surprise to us. None of the companies that use DOSBox commercially has ever donated either money or code. (DOSBox is open source, so anyone can add new improvements to the code and/or create patches to fix problems with specific games; this is what I consider donations in code).
We have received an occasional gift - either games or items related to them, but the companies never donate the really important things: code and/or money.
In fact we have never been given the games that are sold with DOSBox, aside from the few times where we were needed to create the configuration file for the game. (It's pretty difficult to do that without having access to the game).
From GOG we got a few free game coupons. (I think all people who joined during the press beta got them)
Maximization of profits is probably a large part of the reason for that; it might be difficult to explain to the bookkeeper why you gave money away to something that is free, but giving away a game/item you have in stock is easier and can be considered PR.
Fortunately, we do receive donations in money and code from individuals.
I don't expect many from the average GOG customer, though. After all (s)he has already paid money in order to receive the package which includes DOSBox, I doubt that (s)he will feel much incentive to pay even more money.
I'd like to point out that my membership on this forum has nothing to do with whether we approve of GOG using DOSBox or not. I'm here because I like old games. Our opinion on GOG's use of DOSBox is irrelevant, as they don't need our permission to do so.
I don't think they coded dosbox for money, but rather due to a love of games.
Correct, however we didn't really code it for others to make money of it either. We are honoured that our program is used by GOG (and other companies) to run their old titles, however it feels a little weird that others are making profits from a product of 6 years of our work.
Of course this is allowed by our license which we chose ages ago, which, as noted above, can be changed