I wish I'd recognised earlier on that I should be working vertically if I wanted to see faster growth on WEBTOON. I was drawing and posting my comic as pages, because I wanted to print it. (I still do, only now, I'll be reformatting from vertical to page.)
Due to that mistake, I missed the window for promotion in 'Up and Coming' on WEBTOON, despite my comic being similar in visual and narrative quality to those which are typically promoted there. That can easily push a new comic into the 1k subscribers bracket, which opens it up to more CANVAS promotion down the line.
Now, I have to try to reach 1k organically, through my own promotion efforts. I know there was no guarantee it would have been promoted anyway, but had I done things properly from the beginning, it was reasonably likely. It stings a little, but I can't be too harsh on myself. I was a novice, I clearly needed to learn that lesson through experience, and hopefully I'll get the right eyes on my comic in time if I persist.