I know a lot of social media platforms are in decay, but I've had precisely the opposite experience to you - the majority of my readers before I got promo'd were from here on the forums, and from social media outreach. Mostly Reddit, and a bit from Twitter and Instagram. I didn't have much of a following on either platform, and most of what I did have were more interested in illustrations than webcomics.
Social media is all about jumping on trends and using the right hashtags to get eyeballs on your work. Just posting doesn't do much, you're absolutely right about that. It's about timing, and getting the official accounts run by Tapas and Webtoon to notice and share your work.
The point I was trying to make was not to place all of your eggs in a single basket so far as building an audience is concerned. Have a few different places you use to promote, use hashtags and @'s such as #Tapastry, #CelebrateCANVASDay, @Tapastry_TCC, and so-on, and schedule posts during the time the social media teams for Tapas and Webtoon are working.
Obviously, having your comic show up in Fresh is important! You're right, and I'm not denying that. Some people do use it, perhaps more than I think. But in the experience I've had, it's not as important as the other strategies I use.
(EDIT: Your comic looks gorgeous, by the way.)
