I disagree, these minimums and requirements do not exist on Tapas and make no sense. Noone would find much success uploading 1 panel updates all the time anyway, especially not at Webtoon. The audience would lose interest.
40 panels would be way too much as well, some of us are uploading 5-15 panel episodes on a more regular basis already before the (possible) ad rev program. We'd be tossed aside for "abusing the system" if these regulations were in place.
To top it off, it would make it impossible for 4-panel comedy comics or similarily structured slice of life comedy to monetize their content. They would have to choose between no monetization on webtoon, vs abandon their artistic expression, vs compromise their artistic expression by jamming several different comic episodes with different subject matters into a single update. Slice of life creators would pull their hair out just hearing about it.
I think you are overestimating the financial power of teens online. Irl it's different, but many teens have cards that cannot perform online purchases or do not have a card at all.
My observations with an audience that spans people mid/young teens to adults is that the teens are more likely to read a lot (so you get ad rev) or tip (watching ads), whereas adults with stable jobs are more likely to use money out of their own pocket on your work. Whenever the subject of paying for something comes up such as when I release a new book, the loudest message I get from teens is: "MOM WON'T LET ME BUY IT". Or, in the case of gay content, many people have homophobic parents that would ban their teens from the internet entirely were they to even ask about buying my stuff.
It might be different if your content is cisstraight and doesn't contain anything that would make a parent go "no, betty, not as long as you live under my roof!"
These things all combined is why paid content does better when targeted at adults. That, and...
^^^due to the sex shaming society we live in, ad providers don't always want to run ads on adult content. So subscriptions and other non-ad-related monetization methods aren't always just easier to sell to adults; in the case of adult content they are sometimes the only way.