[tessela]

from https://developer.apple.com/support/enrollment/

Do I need to enroll to install apps on a device? No. You can install apps on a device for free with Xcode. You’ll only need to enroll if you’d like to distribute apps, access beta software, and integrate with capabilities such as Siri, Apple Pay, and iCloud.

So, Epic, Spotify and Tinder can make their stores, they just need to automate the process.

[saurik]

You are limited to three total apps installed for free with Xcode, they expire every seven days, have limited API surface access (you can't build a VPN app, for example), and among the things you can't integrate with is push notifications, which is one of the key reasons people build apps in the first place. So uhhh... thanks for playing, but that isn't helpful.