DICE is great, but most of these are tied to venues. Most of the bigger stages, stadiums, theaters, etc. all have contracts through LiveNation, so TicketMaster/LiveNation is the only way to enter those venues.
You can sometimes call the box office directly though.
I’d imagine he means Varg Vikernes. He’s like the poster child for this whole problem going in the community, specifically the BM community.