I wouldn't say it's not normal. On YouTube, it's certainly proven to literally give you an advantage, even at the cost of your audience's annoyance. (Though, to be fair, if you really like a creator, you don't really mind them saying like and subscribed, since it's often quick if they do it right.)
This isn't YouTube though. You're not really fighting against other people for the algorithm. It won't do much for you here as much as it would on YouTube. But it'd still do 'something'. How much that is and if it's worth it is up to you.
Personalllly. I just avoid it on this platform. People knows how to like and subscribe. On YouTube, audience may forget, and they actually do it when the creator request it because the audience knows that truly does help the creator out that they've been enjoying the content from.
On here though, yeah, it's different. But I don't see much harm in it. Depends on where and how often, most readers aren't going to mind it and blankly scroll pass it. If someone wants to see more of the story, they will subscribed, which does 'do something', they'd get update when you update your story. I'm not sure what a like is worth on this platform.
When you look at the community tab, it just shows the numbers the stories been viewed. On this platform, I don't feel like creators are really 'fighting' against others for the limited attention of readers. On YouTube though, it's certainly like that, most creators are competing with others that are making similar quality content, and there's only so much limited views to go around. On here, unless you're like churning out romance novels to compete with other romance novels constantly, it's certainly not the same.