JMich: Composers and musicians are no different from any other content creator. They can have a ton of different contracts defining how they get paid and/or what rights they retain. Owning the rights to a content doesn't automatically mean you get a share of any sales, and getting a cut doesn't say anything about the rights (other than the fact that you probably have a right to distribute said content).
Let's say an advertising firm hires me to write a jingle for an ad. I'm an unknown, so will I be paid for each time the ad is played? Probably not. If on the other hand though I'm a household name, it is quite likely that I'll be getting a cut each time the ad is played. In both cases, I retain the rights to the music, so it cannot be used for another purpose.
So, all in all, there is no set way for a content creator to get their money for their content, it all depends on whatever contract they've signed with the one that asked for the content to be created. In other words, a mess ;)
so, if i understand right, if a musician is hired by contract for delivering/making music for a project, he is just one employee like any others, and whatever works he performs during his contract is the property of the company who hired him, right ?
in theory, the contracter would not even have any legal obligation to mention his name anywhere as he was just part of the "manpower" of the company ?
correct me if i got it wrong, though ?
anyway, in this case, i now understand better how usa/anglosaxon copyright works... it's just quite different from in my country (where an artist can be commissionned for a job/work but cant be stripped out of some unalterable rights regarding the art he made...)
anyway, regarding my initial question, i figured out that, depending on the publisher, artist will get 0% to 70% of GOG's DLC price entirely at publisher's discretion (given the typical GOG share is 30%) while on bandcamp for example he would get 85% (as bandcamp share is 15%) and he would get barely 23% on itunes/amazon...
An interesting fact whenever you may hold a personal grudge against the publisher/dev of a given game and that has nothing to do with artist not at fault about it... (who said League of Geek ?)
So the decision i have to make if i want some music sold separatly on GOG (means when OST is not already included in the base goodies of the initial game) is "do i want to support GOG and artist at same time, though artist may get maybe nothing" or "do i want to make sure artist will get a better share; even if it means not supporting GOG by the same time"...
I asked that also because i try to maintain a GOGmix of games which music are not even available on GOG (base goodies or soundtrack DLC), and on this case there is no real choice or question to ask (can't get it here, so, best thing is to get it directly from artist at best rate possible for him)... Of course i can't "advertise" or tell out in gog forum or gogmix to ever get catalog-available soundtracks "elsewhere" instead of here (it would be against GOG tos i guess) but i still can note such information down for my private use at least...