In a game resource forum where I admin, we have a thread for copyright free samples and music. Would it be OK to have such a thread here ?

The criteria we have in the UT99.org forum (yes it is still played) is that if a link to the ToC or licence, or quote from the site or author is included it is allowed. Mainly we do it to encourage attribution, so lineage can be shown and credit given. For reference here is the thread https://www.ut99.org/viewtopic.php?f=51&t=4745 (clean site, no adverts)