You can just promote it on here, I do that every time there is a new episode.
I promote the Tapas version here when I update, because this is the Tapas forum. If Webtoon creators are needing to rely on the Tapas forums and that's the secret to getting a foothold, it doesn't exactly reflect well on Webtoon as a platform.
Yeah I also have a big gap from maybe 450 subs.
The reason is:
1. webtoon have a lot of more users.. simple but true
2. On Webtoon there is the canvas area where you can see all webtoon canvas. So if you update and someone look at the all list (many people do that), your comic might be the first comic they see. pretty helpful. By tapas you can also see all comics, but normally you see the popular ones and not the recent updated. especially the app is really user unfriendly in this
3. when your rating is high, what it is normally at the start bc we can also rate our webtoon 
, you appear in a star rated list anywhere on webtoon desktop page. I was there at the start too
You're right, but you do what you have to :shrug:
I also promote on Twitter, that seems to help too. I basically promote anywhere and everywhere I can haha
Honestly since I have over 800 more subs here it just feels easier to focus on Tapas as my main mirror and to use webtoon as just a secondary place to advertise the comic to pick up the odd extra sub on Tapas. 
I feel the same way about Webtoon but you never know when your story will be picked up by one of the sites so it's best to give attention to both imo
First of all: You have nice art work. That is going to help.
In this second part, I am only offering supposition. WebToons has creators, readers, and critics. Critics follow many series just by looking for fresh updates. I am not a critic, so I can only infer their motives. I am a creator/reader.
You can gather dozens to hundreds of readers & critics on Webtoons. But you need thousands of subscribers to qualify for revenue. WebToons limits the number of subscriptions each reader can follow.
Tapas lets you accumulate revenue with a much lower subscriber count (and lets readers earn ink by watching ads), but you need a huge reader base to earn enough to withdrawal funds. On Tapas, you might find creator/readers on the forums. Helpful in reaching the subscriber limits, but not part of the devoted readership that you really need.
I suggest you post tapas updates in forum threads (use links to make it easy to find, and ask for subscribers). I think you will be successful because your series is high quality.
@Chuksi will be happy to hear that, thank you!
I already do that, but thank you again. I'm hopeful that we will be successful as well, we just need time.
Mine as well! I have 150 subs on Tapas, but 30 subs on Webtoon. I guess it's because most viewers of Webtoon are younger than of Tapas. The favored style and story might be different depending on platforms.
Yeah, I originally picked Tapas as my exclusive mirror because I heard (and saw) that the popular comics here tend to have more LGBTQ+ themes (and readers seem more positive about LGBTQ+ content) and more varied art styles. A lot of my long-time friends from the UK small press scene have comics on Tapas and some have seen a fair bit of success. It just felt like I fit in better.
Im in a similar boat with only 9 subs so far. And I only have two subs that interact and comment, one being an irl friend. I debated abandoning the webtoons mirror, but I'd feel bad for the one sub who seems to be really enjoying the comic. Im probably going to keep it up for them.
Wow that's actually pretty surprising! I would have expected BBS would be bigger on Webtoon where the comics tend to skew more action-orientated.
I totally get you on updating for like... the 1-2 people who do seem to be reading and liking pages on Webtoon. At this point I'm like "....well, better keep updating there I guess..."
I think the style and page format is probably what's keeping it from growing faster. I guess compared to the growth I experienced on Tapas we hen i first started, WT is a little faster, but not by much.
Im actually more surprised Errant hasn't blown up, it feels like it should.
I used Tapas for a few months before I started posting to webtoon, so I have more followers here. However, the ratio of views to follows is better on webtoon, and I get at least a few new subscribers with every update, even though I put far less effort into marketing on webtoon.
With that said, webtoon feels like a ghost town. There's no real connection to subscribers -- you don't get to see who subscribes or likes your episodes, and I have never gotten a single comment, whereas I have almost 200 on Tapas.
We get comments on our episodes but I agree with you on that not seeing who subs or likes the episodes feels a bit lonely.
I've got 2 series on both platform
one BL, +18, heavily censored on webtoon and in romance genre there
tapas - started in august 2018 - slightly over 3K subs, webtoon - started in june 2019 - 2.3K subs
way more likes on tapas, usually around the same number of comments, sometimes more on tapas
second one - fantasy (with horror as a secondary genre on webtoon, horror and bl on tapas), started on both in september 2019
tapas - 947 subs, webtoon - 999 subs
harder to compare likes as I'm posting page-by-page on tapas and in 10 pages batches on webtoon but it feels like I get more likes here but more comments on webtoon
I'm not sure about likes but we definitely get more comments on Webtoon. Also, those are pretty big numbers, so congrats!
I also had the opposite effect for a while. Around a year ago, I had less than 100 subs on WT, but more than 400 on Tapas. I did differently tho. My episodes on Tapas are shorter, so I updated more times. I also "hacked" my way up on Tapas by using a BL icon in the thumbnail lol (I removed it). But since my comic was promoted on both sites it reversed, now I have twice as much subs on WT compared to Tapas. My organic growth is still way better on Tapas though.