Hi @VisualChris - if you subscribe to the Indie subscription on Quixel and add Megascans to your library:
- They will become part of your library of acquired assets on Bridge and Quixel.com. You will continue to have access to them via Bridge and Quixel.com for the foreseeable future. Once Fab has launched, they will not appear in your Fab library, but you will be able to find them on Fab and add them to your Fab library.
- If you acquire them prior to Fab launching, they’ll be available to you under the terms of the Epic Content License. If you find them on Fab and download them or add them to your library, they’ll be available to you under the Fab Standard License terms.
The important thing to remember is that whatever terms you download something under are the terms that apply to it forever. If you download something under new license terms (e.g., on Fab), those new terms will apply.
And to your question about free/paid Quixel assets:
Currently, the entire Quixel library is free on Quixel Bridge - Manage 3D content and export with one click under the Epic Content License. When Fab launches, the entire Quixel library on Fab will be available for free under Fab’s Standard License. Starting in 2025, most of the Quixel library on Fab will be available for purchase, with some items still being available for free.
We’re planning some updates to the Megascans library that should make things even more 
than they already are. More on that soon, I hope. 
I hope that’s clear. Please let me know if you have additional questions or if there’s anything I can clarify.