Basically their whole selling point so far has been "We're currently throwing lots of money at bribes!"
That and "Valve's become evil because they're too big and have no competition! Somebody's got to threaten their monopoly to keep them in line!"... which most arguments based on this have seemed to me to be pretty baselessly alarmist.
Valve deserves some criticisms, but has overall done a pretty good job. Aside from some international legal cases that are eyebrow-raising, they haven't yet begun acting like a bloated corporate evil, imo.
Steam's run into some issues as a platform, mainly to do with content control, but it's because those problems are genuinely difficult. Everyone acts like they're not trying, yet they've iterated through multiple approaches over the last several years, and every single one has resulted in angry mobs. When I ask those mobs what they think the solution should be, the response is generally "I don't know but they have so much money they should be able to figure it out."
Every other platform so far has been complete shit and I avoid them as much as possible. Epic's doesn't look to be breaking that trend.
The console wars are a good comparison. Every large company in the industry just wants control over their users that they can use to reduce the size of the industry and their competition. Valve were the first to put themselves in a position where they could have done this on PC, and the way I see it, they've never done that. If they were, at bare minimum you'd think they would disallow DRM-free games from being sold on Steam or games that require launching through a competitor's storefront. Instead they gave us the indie boom.
Epic is a bit off topic, but on a related note there, I would like to know if Windows 10 is spyware and if MS still uninstalls programs they don't want you to have?
MS is definitely intrusive as fuck, and gets worse with every update. But I've never had it uninstall software on me. And I'm not exactly a conventional user.