I read through the whole site and I still have no idea what this app is for.

Perhaps carrying a large collection of FLACs or PS2/Wii/Switch ROMs.

Are they released as a “physical release” without the game actually being physically there?

Officially supported rooting! Makes this less complicated.

NINE HUNDRED DOLLARS for a mid-range phone?? I see they took some inspiration from apple pricing!

This. If you really want to take your phone on your extreme surfing adventure, just put it in a waterproof case!