I doubt it would be practical to hunt you for this.

That said, if you already paid for the game on Steam and now got it on GOG, why not just leave it on Steam? It's not like you have to play it there anymore. Just let it sit in your Steam library, no harm done.

I think it depends. If you say, try to take advantage of a Steam sale to get a game for 90% off, redeem it on GOG through Connect, and then refund it on Steam, I think it might look highly suspicious to the Blues for them to see a game added on your GOG account and then suddenly pulled from your Steam account...especially if the game is still being sold on Steam, and if it's a game that's either with a significantly higher price tag like The Witness or No Man's Sky, or a game offered on an extremely deep discount in a seasonal sale. I get the feeling they're on the lookout for people trying to game the system like that.

However, if you had a game on Steam (which you also redeemed on GOG) that for legal reasons was taken off Steam, I don't think they'd necessarily penalize you if you already downloaded the game prior to its deletion. Depending on the legal nature of the game being pulled though, they may be forced to also delete it from your GOG account.

Yeah I don't intend to like rob the system by doing that process. I'm just seeking an opportunity to like remove select Steam games from my library on it that I got good deals on through Steam. Games that have no achievements whatsoever or even remotely of a use for multiplayer and all that. Transfer them over to the GOG side of things, download the GOG copy, remove the Steam game and have a drm-free back up copy of the game.

It's not necessarily an obsession. It's a concern. Being concerned doesn't constitute having an obsession. For all I know, it could help clarify a matter so that way it is known to people who might see to abusing it, giving them something to second guess or maybe it'll let people know about where Steam or GOG stands on the matter.

Now what I don't understand is having two copies of the same game in two different places as two different versions - DRM-Free and DRM-With. I'd like to manage things the way I want to, if a game I remotely like is best left on Steam for obvious reasons - it stays on Steam. If I want a game on GOG for all intents and purposes, a back up I can play or something I can enjoy without the need of it a program to run, then I may want that game on that side.

What's the point of doing this? Just hide them from your library.

Preferences.

....
Considering that you're in the slim minority as far as these preferences go, I really doubt that GOG's going to let you get away with downloading the file and then deleting the game from your library too often. Maybe once or twice, but after that, it'd look rather suspicious. Even if you're not trying to take advantage of them, they have no guarantee that you're not pirating or something.

I've left the question to the staff themselves. I'll see what their official word on the matter is. Until then, everything is up in the air and this is all just aimless assumption.

There's also a long term advantage of keeping said game in both platforms.

Suppose either of these companies goes under. If your game was kept exclusively in this unfortunate store first of all you're not going to receive any future patches or extra content. Heck, you're not even allowed to buy DLC because you "don't own" the base game as far as they know.

But more than that all you have now is your copy currently sitting in your HD. Which are subject to every kind of mechanical or eletrical failure, virus, ramsomware, fire, water, fat-fingering the Delete and Enter keys... coming home to find your 5yo nephew trying to play games in "uncle infyrim's computer"... Pick your choice among so many ways to lose important data.

Wait, do you think this is a support forum? It's not. If you want a direct response from the staff, you're more likely to get it by filing a support ticket. Considering the large number of threads that are all talking about this subject at once, it's not likely that you're going to get an answer from them here. Heck, you're probably going to have to wait a good while to get an answer from a support ticket.

Since you explained, then I have to give my answer. Whether you like it or not, I can assure you my answer is correct in everything, except when GOG themselves correct me.

Let's take example of Witcher 2.

You have it on Steam, and use GOG connect to redeem on GOG. You download GOG copy and delete Steam copy (through Steam's self support).

GOG then realize you no longer have it on Steam and remove your copy of Witcher 2 here.

Guess what, you are INELIGIBLE to play that Witcher 2 anymore. Your license to play it legitimately is gone. If you install it for whatever reason, you are pirate.

Just because it's DRM free doesn't mean you can do as you please legally.