The MP version of 4.16 should be coming out very soon. I sent it to epic last Monday, they are just super slow. The itch.io version will require manual updating which could cause you to lose work. Thats sort of the trade off between the two. Itch.io = fast iteration but manual updating. MP = slower because of epic but automatic updating.
Epic does not provide any information about the people that purchase our package (that I know of). MSG me over on the forums (I'm OneShotGG) and I will see what I can do.