Its against tos to steal ip which is clearly happening here
In rule 1.7 Respect IP Ownership - The content you create, publish, or use cannot infringe or violate someone else’s rights, including their intellectual property rights (such as by infringing their copyright or trademark). You must own or have obtained the necessary rights to share and publish the content, and any such license must be broad enough to grant Epic a license consistent with the Fortnite EULA and the UEFN Supplemental Terms. More information about copyright can be found here. Why is this allowed this isn’t fair for people who actively follow tos