The site with the article won't load but going by what I can see it's more than second and third combined (Idol from Oshi no Ko S1 and Kick Back from Chainsaw Man S1), which is a little odd. It's worth noting that just about every other entry on the list a shounen, lots from extremely recent shows. Perhaps the band itself has a large fanbase I'm unaware of, because Lain is imo pretty niche.