He may not get paid from every site, but while he's possibly being paid by sites like Blabbermouth the payment for sites like YT and Twitter etc rarely come from the company. News site (and we'll call Blabber one of those for this purpose) could pay someone to attract traffic by comments and heaps of them. But when it comes to sites like YT and Twitter what you get is secondary companies, some might call themselves advertising agencies, but it's a loose term, who are paid sometimes by the top company (YT/Twitter/Etc), but usually by businesses or social influencers etc who want traffic. Prime example is those "how to" video makers on YT, they would get emails (spam) offering likes and comments for a fee, these companies sending out the emails if successful do a deal with the video maker, the video maker pays a fee and the shitty ad mob pay someone else a smaller fee to make comments and attract traffic. The process can be adjusted for pretty much any platform that allows user interaction. These people like DW are ego maniacs and in some cases probably don't even agree with the side they argue, but if they keep the argument going every refresh of the page is an increase in traffic.