It was probably cancelled because lack of interest
I looked at some of the videos and the impersonator wasn't very good
The Jacksons or anyone can promote or host shows about Michael. Its legal. There are probably hundreds of Impersonator shows all over the world. Now if they use MJ music for profit they would be required to pay royalties fees of some sort. I'm not sure what kind allowance are made for shows like this .. maybe if they sing covers of MJ songs it's a different arrangement than if they use MJ recordings.