MK will get some fees because of his rights, same as he will get from the shows of John Illsley in the Netherlands.
And be realistic, everyone knows who the composer is. And .... any regular coverband, marriageband etc don't mention any composernames of the songs they are playing, otherwise it wasn't a band but a talking group also playing some songs
And indeed Jbaent, people who don't follow DS/MK as close as we do (so the other 99,999999% of the population) will be confused. And every promotor, hall or whatever will use the word DS where they can to attract as much people as they can. It's their right.