Our category of "Free" Megascans assets, and Megascans assets for Unreal Unlimited plan are 2 separate sections.
Unreal Unlimited is a subscription plan, free of charge, for users who intend to use Megascans exclusively in UE4/Twinmotion. This plan offers an unlimited number of points to use for acquiring assets. This also means that when you switch from a paid plan to Unreal Unlimited, your existing accumulated points will no longer be accessible.
Our "Free" assets are a separate category, the Terms of which are detailed over at quixel.com/terms.
The assets in the "Free" category are 50 free assets for users on the one-month free trial, for evaluation and testing purposes.
You may use our Megascans assets in your project from the Unreal Unlimited plan, provided that they are incorporated as an inseparable part of the project and the end result is in UE4/Twinmotion. This project can then be used commercially as per EULA Terms.