I've gotten a lot of critiques before that are very valid, some of which mention things that could drive away potential readers i.e confusion. But if there's one thing I've always noticed in media and feedback, no one really minds as long as it's enjoyable to read. Mind you that doesn't mean don't fix them, there's always room for improvement, but I've read things with very simple art styles that get so popular because it's funny or grabs my attention.
Clarity and enjoyableness. As long as you have those two, it's easier said than done, but as long as you do you will always gain a good audience. Try having those at the top of your priority next time.
Step one: go to your Dashboard, click on the Series-tab, and then on the little pencil-button next to your series (marked in red circles here, examples from my own Dashboard view:)
Then scroll down until you reach this part: 
I've already got a thumbnail, but if you don't, the box will be empty and you will be able to click on it to upload an image from your computer, as long as it's 300x300 pixels!
As for how to make it cool.... Well, look at the thumbnails of series you like, and try to figure out what about them you think is cool, and then do something like it! Lots of people put the faces of characters in their thumbnails!
Oh I do that all the time
Its only on webtoons I don't do that cuz my comic files no matter how i edit is larger than the size limit so i use my comics banner
Do people find you take a hit if you take a break to catch up and try and do more detailed, quality work?
We took a longer break after our first story arc, but now have content loaded up until September. I worry though that following our second arc if we take a break, then we will also lose folks.
I've loaded up design content, but will that frustrate folks looking for more story content? is it better not to update than to update with some "bonus" material?
Zip Kramer - Saviour of the Cosmos5
9 days later
I'm finding it kinda hard to get subs too... There are people reading the pages, but I suppose the slow nature of my storytelling may not be that attractive in the beginning, oh well...
here too 
but I'm hoping mine will improve soon as I have a feature with best web comics coming up.
I know the problem with Talesfromswipecity4 is that it has physical punishment in it and lots of people
can't get past that, but it has such a lot more going for it.
I think it has to do with advertising all over the place and updating frequently, that and as they said above thumbnails. I've only started about a month of updating and I can't update but every two weeks. So I actually understand why I can't get subscribers that and I actually have my comic all over the place ironicly as much as a lot of people don't like posting to tumblr a lot of my fans come from there or smack Jeeves but I've been updating for over 2 years there and it's no where near as high as a lot of people on taptastic have over 1.5k subscribers so it can be a bit heart breaking to see others have so many.
But all in all I say not to give up. don't stop doing what you love even for the few that subscribe remember to also do it because you have something you want to share to the world and if you love your story the. Don't stop and always share there always bound to be people that will love seeing and reading your work.
I didn't expect any subscribers anyhow. It's not like I make comics for the main demographic here, or people in general.
I've gotten used to being invisible and irrelevant. I should probably sign up for some international spy organisation work soon.
I'm at exactly 98 subs and its so close to 100 that. Its. Making. My eye. TWITCH.
Otherwise, it been pretty steady and I'm more than happy at the numbers I do have and get. 
Ha! You sound like me when I was at 48 subscribers, I was like "Just hit 50 dammit!!" and now that I'm at 71 I know the whole thing will just start over again as I get tantalizingly closer and closer to 100... pfft
Oh yeah, its a Cycle of Pain. I was this way at subs 23, 48, and 73. And I will be just as twitchy later on.
well I think it would really take much time and effort for us to gain subscribers. I also have 1 subscriber but I hope it'll grow 'coz i've just returned in tapastic just a few days ago. you can check it out here if you want to https://tapastic.com/series/AFRO2
but as i've said, it would really take much more time before we get a load of subscribers. Also, we have to make our comic great in terms of storyies or humor 'coz as I have observed viewers are not just into art style or how good your art is but they want a good story or a funny story no matter how your drawing look like. Based on my observation ^.^
The subscriber rate for Radio Silence4 seems really strange! It's been hovering for a while around the same area, but with my return to Tuesday updates, it shot up 10+ people overnight. It wasn't even a particularly exciting page! It could be the increased frequency or just that I posted on a Tuesday in the early morning. I guess I'll try another Friday and see if it makes even a dent in the subscriber amount this time!
Gaining sub is sorta slow process I have to admit. Lot of the time your series will get washed away in the new and fresh section with new comic being updated. My series is :Rebirth7, it's quite new, I only just posted it almost a week ago or so! On Tapastic, every day I gain a few subs or so, around 3 or 4. Until now I only have around 60-70 subs haha. But surprisingly enough on Webtoon4, :Rebirth does a lot better at gaining subs despite I have never tried to advertise it as hard as I do with my Tap link. (I gained over 800 subs in a little more than 3 days ;; _ ;;) I feel like I need to raise my bar to try my hardest and not failing all these people the pressure is real
As long as at least 100 people are reading your comic, I wouldn't worry about subscriber count that much at all.
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