Though i dont have 5 products on the marketplace, my toolkit is actually the 2nd blueprint that was online in the marketplace, so yeah, there from the beginning and always updating and trying to get more people from the UE-usergroups to do assets (i actually did a 45 minutes speech about the ue4 marketplace on the CEGC 2016 too on the Epic/Unreal track of talks). Also, going through some pretty rough processes and situations with the marketplace team (note, WITH not AGAINST), back then i thought we already had some kind of trust relationship. This was a part (communication!) that Jon Jones was really good at.
Really, if something is wrong, its the worst case to stay completely silent as it seems to be now. At least talk with the sellers about it.
But i guess i shouldnt rant around too much, since i was lucky and didnt have to really update my packs for the last 2 releases but just set the compatibility.