amok: DRM is still, I hope.... Digital
Rights Management.... the codeword here is
Rights. If the what-ever-thing you are looking at do not manage your rights, then it is not DRM. So for online what-ever to become DRM, then there must be some elements there that checks your rights to play the game. If it does not, then it is not DRM, but a dependency.
amok: If they do not manage your rights to play the game... how do you define DRM? is it "things-I-do-not-like"?
That ultra-strict personal definition of yours never has been a universal definition. Examples:-
"DRM technologies try to control the use, modification, and distribution of copyrighted works (such as software and multimedia content), as well as systems within devices that enforce these policies" - Wikipedia
"With relation to PC gaming, Digital Rights Management (DRM) is commonly used to refer to copy protection and / or technical protection measures employed by companies in an attempt to limit the manipulation and copying of game data and content by end-users after the purchase, download, and/or install of the product" - PCGamingWiki
So both anti-cheat and anti-tamper systems that do no specific online check to check your "right" to play a game but exist to control / remove the right to modify a game offline, as well as offline copy protection systems (eg, code wheels, CD checks) and increasingly "gating" some single-player content behind an online server for copy protection reasons whilst claiming it's "bonus content" are all in practise widely regarded as DRM as well. Same reason why no-one falls for the
"Denuvo is not DRM it's anti-tamper" BS, why PCGW has sections for "physical DRM" & "disc DRM", and why no-one calls Diablo 3 a "dependency" as if it were no different to bundling a VCRedist inside an offline installer that works offline.
Pointless argument : "But, but, but they may have other reasons. Eg, it may be BONUS CONTENT so therefore it's not DRM" Reality : It's both. No-one's that naive anymore that they think post-purchase access control issues can be neatly separated in some 100% vs 0% black & white world, when devs have previously openly admitted they have ulterior motives to requiring online-only "bonus content" in single-player games as an indirect form of DRM.