https://wccftech.com/gearbox-epic-helped-us-reach-new-players-with-borderlands-3/

Borderlands 3 launched as an Epic Games store exclusive on PC and it will remain as such until next Spring when it will land on Steam. Many thought this would somewhat limit the initial player base of Borderlands 3 but in an interview with PCGamesInsider.biz, Gearbox Senior Producer Anthony Nicholson said the deal with Epic actually helped them get to new fans.

The appetite amongst fans was definitely there, but Epic have been great partners and have done a lot to help us reach new players as well. So I’d say it’s a combination of everything that’s culminated in the success we’re seeing.