Epic games started its own games store where we can buy games digitally just like Steam. Now, Epic has its own store so they started to move their digitally-sold games away from steam. This new Epic games store will not only sell games published by Epic but will also include third party publishers. Third party publishers can get 88% of revenue share and keeping a 12% thin margin for handing DRM, unlimited downloads, and update patch distribution. If you compare it with Steam they take 30% margin. Epic is also offering additional incentives to third-party game studios that use Unreal Engine.
Epic games started to pull out their titles from steam store already and it’ll not affect those people who already own Epic titles on steam, as future installs and patch update will continue.