I'm not sure what you're asking so I'll just expand on what Epic did. Epic made a deal with Ubisoft where Ubisoft releases their game on their store and on EGS but not on Steam despite all previous Ubisoft titles being on Steam. I remember there being another smaller publisher who made a deal with EGS and released their game on other storefronts (I think it was EGS and GOG but it also could've been the MS store) but not on Steam. I would consider that exclusivity targeting specifically Steam.
You are not arguing in good faith here - the other user is being very clear about their question and you are pretending not to understand. You invented a sourceless situation to answer the question while saying you didn't understand it.
His question was not clear to me which is why I stated I didn't understand what he was asking. And then expanded what I meant by exclusivity to see if that answered his question. And while I didn't have time to go find the sources especially since finding the source for the other publisher IMO isn't worth the effort (mainly because searching the web for anything very has become next to impossible unless you know exactly what you're looking for). The Ubisoft one however is really simple, anyone with basic googling skills could find it.
If anyone is here in bad faith it's you. You instantly assumed I'm being disingenuous and come attacking me without even doing a basic check to see if you have anything to attack.
You cherry picked a single example you couldn't recall until pressed. It's really obvious you're only here to trash a storefront you don't use for no reason. If you recall, the division 2 was only on uPlay, requiring you to install the game through it even if you purchased it elsewhere - and that's a substantially worse data collection vector than EGS (multiple breaches) and it is actually missing features like linking of DLC to the store page. What's your point?
You're incapable of having a rational discussion and ignoring the fact that you needed to install uPlay even when buying it through other storefronts. This isn't something steam did better on, and you googling and linking the first article you see that remotely confirms your viewpoint (which is now detached from the thread) is kind of childish