You know, we're still kind of new, but what's helped us out a lot so far is addressing short-comings or challenges and seeing how to solve them or rise above them. That should be the first goal for Tapas folks always. Tapas already does an amazing job of monitoring things for you, views, subscriptions, etc., so work with this valuable info. Do you have a page that didn't get many likes, for instance? Write on your wall and find out what was different about it, get a survey and then answer your comments. Stuff like that.
As far as the subscription challenge goes, that's easy really to get past, but it requires you to do a little hard work too, and that means telling people on social media, other forums, comic sites, link exchanges, wherever you feel you can reach the kind of sites that work best with what your comic offers. For example, one of our webcomics is "Insignificant Otters", and since the comic revolves around otters, we plan to check out some of the most popular forums for otters especially and subscribe and post pages of our comics there. So think about the content you're actually dealing with, and then find your audience that would deal specifically.
One thing we have found helpful is actually interviewing other comic artists, which is a LOT of fun. And since we've both spent the last 20 years or so interviewing all kinds of celebs, this comes naturally for us.
Our only challenge right now is being NEW. But we already have a massive audience from another webcomic we do, a more daring one which we cannot post here, so when we told them we were doing a comic strip, they came running. ^^ So if you already have a built-in audience anywhere, start there for sure. Friends, family, co-workers also, let them know what you're doing, show them what you're doing, and get them to spread word too.
We're Scribes Unlimited and we actually have two webcomics here:
"Insignificant Otters"
https://tapas.io/series/IOtters
"Island Girls"
https://tapas.io/series/Island-Girls
Thanks everyone, and don't worry. If you've got a good webcomic, you can succeed. 
