I think OP should maybe be a bit more open about a vested interest here. According to LinkedIn, she's an employee of Mythrill, and from her posting habits, it seems pretty transparent that she's on this forum to market the platform.
Also, during my digging, I discovered that Mythrill uses AI for making the artwork for their various covers and "Lore Cards", which is a hidden factor that may potentially impact decisions. Tapas, of course, has recently banned all use of AI for art on covers and comics for both ethical concerns, but also the muddiness of copyright around it.
I also notice, that unlike Tapas, where you can withdraw earnings at $25, Mythrill it's double that; you need to accumulate $50 to withdraw... That's quite a lot for a novel, especially on a platform that's currently really hard to find on Google. Probably a lot easier currently for creators with a large presence online who can act as brand ambassadors and try to draw people to the platform... like OP appears to be doing here.... (bit cheeky... and against forum rules. The mods are lenient, but I feel like the sheer amount is taking the piss now).
Tapas contracts are pretty good (speaking from personal experience), but usually need a very big readership to get or to make them work. You keep all the rights to the IP. You're allowed to post to other platforms unless it's a "Tapas Original" series made explicitly for the platform. Making money from the contracts does require a very large audience, but because it has a tipping system with ink, you can actually make a fair bit of cash from the site if you have a medium-sized following, and highly engaged reader base. I've made somewhere close to $800 on Tapas over the few years I've been making my comic, which presently just hit 2500 subs. I make more on top of that from my Patreon, and the recent print book kickstarter.
Like most platforms, Tapas works best if you make or customise your work to fit in with what performs well here specifically. You definitely need to be making something with a core audience in the late teens to mid twenties region, and because it's more like a comics platform that also has novels, you need strong presentation that would appeal to somebody who likes modern webcomics or east asian "Light Novels", so colourful illustrated covers focused on appealing characters with polished typography tend to perform well. I know some people who have a colourful illustrated cover on Tapas, and then a moody photo-montage type one on Radish for the same book. Tapas readers like short chapters and stories that get started quickly with a strong "elevator pitch" type concept, and they like a focus on characters and emotional drama or conflict over physical or political-focused plots. Fantasy is a popular genre, but is dominated by Isekai because of the appeal of a "relateable" young protagonist from our world and the ease of exposition that facilitates, and Fantasy with a strong Romance element tends to perform best.
An advantage of Tapas is that because the strongest promo is internal features on the app itself, it's less reliant than a lot of platforms on being well-known or having an established fanbase. If you make something very polished, and very suited to the platform and get noticed by the staff, you can hypothetically blow up here out of nowhere.
Some platforms do the quality vetting and making your work fit in for you, like Mythrill, where they'll only let you in if they think your work will perform well (like a traditional publisher. Radish does this too), and then giving you art in a style that's on-brand and they feel will appeal to the app userbase (Radish doesn't do this). On Tapas, its up to you to do the work of trying to figure out what to upload, how to present and describe it etc. which a lot of people seem to struggle with. A bit of branding-savvy goes a long way on an open platform like this.