As far as I know, there isn’t any QA taking a look at the smart assets now, or at least not in the same way it were with Epic’s Unreal Marketplace. If there were any real QA there weren’t tons of copyrighted stuff approved (Even saw some of Quixel stuff being resold lol)
Be careful from who you’ll buy it from, if it’s a novice there is going to have a lot of issues with the skeletal asset even if it says it’s compatible. Replace the skeleton they have with the mannequin and see if stuff like control rig and such works perfectly.