You may get a better response from the host but I believe the most important thing is that you have full rights to use the content commercially and understand the attribution requirements if any. Here is a snip from the licensing agreement you sign when uploading. If you can freely use the content it should be fine if its not AI made
5. Representations, warranties and indemnities
[5.1] The Artist represents and warrants that the Artist:
(a) is the sole author of the Works, which are original to the Artist;
(b) owns or has been granted all rights and interests in the Works necessary to grant the licence to the Licensee under this agreement; and
(c) has the power and capacity to enter into this agreement and to perform the Artist’s obligations under this agreement; and (d) has not included AI-generated content in the Works.
A similar post came up about content from GameIcon.net, maybe check there for more answers?