you know what i meant, please don't play the jester move 
 
 when i purchase on gog, i get access to an offline installer 
 from this moment i can install, launch and play the game without any need to connect to my gog account 
 
 when you purchase little items through microtransaction, well maybe if it was already a paid game tied to, lets say, your gplay or itune account (using mobile platforms as first or main exemple for micropurchases), then without any data connection you could still play it on plane mode (because your mobile device system and account is already a first layer drm), but if you purchased lets say, cosmetic items, usually the game will have to connect and check online to make them appear (even while said items are already downloaded on your device) 
 
 anyway, to jump on your wagon: YES, GOG is in fact a drm in a way,as it tracks back which games licences i own to use. would gog shut down some day, or delete my account, unless they send me a paper list with some officiel stamp that states as my former account was tied to me as a person, and said accountheld the game licenses i purchased, then, basically even if i kept offline installers on my drive they would be considered as pirated games (i cant proove license ownership) 
 
 now some old physical games had no drm protection at all, which meant the disk acted both as a medium to install the game and as a proof of license ownership; disk was required to install game, but not to launch or play it. and disk was the proof of ownership (of the game licence, not ownership of the game) 
 i could give it, sell it back (in either case, i shouldnt be using the game installed on my computer anymore), my relatives could get them as legacy... see ? drm free 
 
 
 so gog is the least drop of drm we can see nowadays, on a range going from gog to insufferable multilayers of drm (like a ubisoft game with micropurchases: steam->uplay->denuvo->game devs's account for this game's content and micropurchase... DRM fest HO !) 
 
 but why do i bother saying all that ? we both know why you were saying that