Also, someone asked about the contract. I'm really not sure how true this is or how it applies to an anthology. The info is a number of years old because they're not really allowed to talk about the contract till it's over. To keep how much they pay each author a secret, fair enough, some are paid more than others.
But apparently after 3 years the contract with webtoons for an original ends.
You can't delete it from Webtoons, but after those years, you can do whatever you want with it because you still have the rights. Post it to another site, make it into a book, or so on.
For curiosity's sake, it's just nice to know if you do get an originals one day, you might have the option after a few years and your comic isn't 'sold' to webtoons, forever.