Dudes, don't get discouraged.
Take it from someone who's had their comic promoted by Webtoons five times, it's a double-edged sword. Yes, you get a huge increase in views while the promotion is up, but the minute it comes down it stops like a tap being turned off. You'll also likely get a huge increase in subs, but it's been my experience that the bulk of those subs won't convert into regular readers and won't increase the number of likes or comments.
And that's how it can hurt you, because Webtoon's popularity ranking works on an algorithm, and if if sees you've got a whole bunch of views and subs with a relatively modest amount of reader interaction, your ranking is going to be punished, and your series buried behind brand new webtoons with comparatively much lower sub and view counts.
What I'm trying to say is being promoted is not the be all and end all of reader engagement.
Yes, some comics are being promoted while most are not, and some people are coming into the competition with already large and loyal audiences, but do we have a reason to believe that Webtoons will score the audience engagement element of the score on raw numbers alone? Aren't they just as likely to look at the views and subscriber counts in context? And to measure the number of likes and comments against those numbers? I think so. At least, I hope so.