It’s not really that underwhelming. Disclaimer: I don’t condone child abuse. I find it abhorrent, and I will never justify it.
People have fantasies, though. If a dude searches for “burglar breaks in and has sex with milf,” does that mean that he wants to do this in real life? Of course not (or god I hope not!) So, some people may have searched for “dad has sex with young babysitter” and bam! Bot! Some people have a fetish for diapers - there are tons of porn of adults wearing diapers and having sex. Not my thing, but who am I to judge? So again, someone searches “sex with diapers” and bam! Bot!
Let’s not forget that as much as pornhub displays a sign saying “Hey, are you 18?” a lot of people will lie. And those young folks will also search for stupid things.
So I don’t think that aaaaaall 1+ million searches were done by people with actual pedophilia.
The fact that 1,600 people decided to click and inform themselves, in the UK alone, well, that’s a lot, in my opinion, and it should be something to commend, not to just say “eh. Underwhelming.”