I got a TP-Link UH720 and Raspberry PI 3 (Raspian) and ran 4 Moonlander 2 on them. They run at standard core voltage @ 796 MHZ so about 4,5 MH per Moonlander. The power consumption for the hole setup is 50 watts.
Interesting hub find, they don't advertise how many amps per port but they do advertise a 12v 4amp power adapter is supplied. Good to hear you got 796mhz out of this setup on 4 MLD2's -- how long you been running this setup?