They're definitely less "Radio 1". But in terms of mass market appeal, Nelly Furtado has more monthly listeners than anyone else on the list. Mel C is the single most famous person on the list. I think both lists are different kinds of mainstream. I do take your point though.
I think it's this...
It works both ways though, blokes* at one time were getting absolutely bombarded with unsolicited nude pics from girls, and videos of them doing all sorts, on Snapchat, to promote their Onlyfans, or whatever... It just made me laugh, seemed counter productive to their cause. I was often tempted to reply with "why would I pay, you just gave it me for free!"
My daughter was being messaged by a bloke when she was still in secondary school, 13 / 14 maybe, thankfully she had the sense to bring the phone to me, let me carry on the conversation, and work out exactly who it was.
*read 'I was,' I assume it was widespread, but don't actually know for sure.