Nah mate, I think that's in the TOS
That being said, I can totally understand the aversion to hopping on LWT given what I've heard about the reader community and the recent changes. I would also say that I have my concerns, though they are more focused on the question of LWT's cash flow.
Is it just funded through the (recent) ad revenue and parent company sponsorship? If that's the case, I just have a really hard time believing that LINE is making a profit here, especially given the fact that they can salary so many artists on top of paying out to the Patreon campaigns of some of their other, bigger creators. It just doesn't add up and it makes me hesitant to think about putting any work up there, even if it fits well with their platform, if I don't see the revenue system fleshed out a bit more.
The reason why this bothers me so much is that the first comic site I ever joined was Inkblazers which, as many of you may know, went the way of the dodo a few years back. When I compare Inkblazers and LINE I start seeing alot of similarities - (seemingly) primarily investor funded, featured artists getting monthly stipends, constantly bringing in new featured talent - and it makes me feel like the bubble could burst again. Inkblazers actually had more revenue streams than LWT (in addition to adds it offered a premium reader membership to see pages from featured artists in advance and also gave artists the option to set up a storefront on the site and took a percentage of the revenue from sales as well). In the last few months of Inkblazers life it was business as usual, still bringing in sets of new premium creators on a monthly basis and opened ad revenue up to all members. Less than a month after it brought in it's last batch of premium creators it announced its closure due to pulled investor support. If I recall correctly, even the paid creators and admins weren't warned in advance. It happened that quickly.
So after experiencing all that, seeing LWT lagging behind on the revenue front (as far as is visible, at least) and seemingly attempting to reduce losses by restricting payouts rather than introducing some sort of premium content (like the coins and early-premium chapters on their Korean site) certainly makes my stomach drop a bit, especially for the creators that make their living through it. Mass website migration is a hell of a thing and quite fascinating to watch, but all things considered I'd rather not go through that again now that I've already started to put myself out there. That's not to say it can't happen here, but confidence is important.