It's a whole complicated mess and honestly... most people have absolutely no idea what they're doing, including a lot of very popular people, but people like to give advice, whether out of a genuine desire to help others or because giving advice and putting out tutorials is a good way to appear as an "authority" on your subject and a good marketing technique... and obviously people want advice... And so you get a lot of people giving incredibly unhelpful advice.
Because there are essentially two kinds of people who build an audience in current webcomics, and chances are most of both groups will struggle to give you effective advice.
Group 1: People who simply made a fairly polished comic that's easy to read on a phone by drawing it and presenting it in a way similar to comics they like (which were optimised for mobile) and in a genre they like and it blew up... because the genre they like is something like sexy BL or Villainess Isekai. If you ask these people "how do I succeed on Tapas?" they'll just tell you "Have you tried posting on social media and updating regularly?" and make you want to scream, "NO S***, SHERLOCK, yes I tried that!" but they're seriously trying to give good advice... that's literally what worked for them, and they've never experienced trying to sell a comic that isn't perfectly on-trend or had any struggle finding where their audience is.
Group 2: People who worked their arses off learning design and marketing. They carefully planned their comic's brand, they probably do stuff a company would do like having brand colours and fonts and think about the "tone of voice" to make sure all their marketing materials stick to it. They may well post regularly and try different campaigns across multiple social media. They'll put themselves forward for every possible event and award they can. They probably planned how to make their comic look good and read well on Tapas very deliberately by doing research, agonising over their font choices and how their opening is paced. This group will technically give you good advice... but it's really not short and punchy. "Post some memes now and then!" is much more fun and immediately actionable than, "go and read some professional books on typography and branding" or "look up comp titles and research their marketing techniques and which ones got the post hits then try to reverse-engineer it"
As a group 2-er, I know I can tell people to improve their comic's typography and readability on a phone, or try to target their marketing towards fans of works with a similar vibe til I pass out and the vast majority of people won't listen... because that kind of "try hard" "sellout" attitude isn't as fun or cool as the, "make what you feel! Post funny memes about your OCs on social media sometimes!" advice that the group 1s will give... but if, like me, you're not somebody who by pure chance happens to be drawing in a perfectly on-trend style, format and genre, and if you're in a group that gets sidelined by media... you have to. It sucks! It actually really sucks and feels really fake or annoying or even selfish or greedy, but that's what's involved, just pure try-hard grind and always saying "Ooh! ME! ME!" at opportunities.
But discussing this stuff is a really easy way to tread on people's toes. Group 1 people don't want to be told they're only popular because they happened to make work in a popular style/genre/format... because they're not, they're usually making something very polished too! And Group 2 people don't want to be told their work isn't very good and they only got popular through marketing the crap out of it...because they didn't, they worked really hard to make their work entertaining and attractive! And neither group wants to be told that comics are basically a lottery and they only got popular through luck, because obviously almost any kind of comic involves a lot of hard work and it can come across very dismissive. So sometimes people who bring up these feelings just really tick off either other creators, or the people who want to stick up for other creators... and then you get the people who just want to be righteously angry...and you get a dogpile. 