I think so. It’s an idiot move by Epic on their part. No doubt Samsung are getting their cut as are every other app store out there. The fact they have bypassed the Google Play store says more about the company than it does about caring for the safety of their own fanbase.
Ausdroid: Fortnite for Android reminds users to be safe, and to block installation from unknown sources.
The Conversation - UK: Fortnite is setting a dangerous security trend.