I spent quite a while doing that, and I still kinda do. I quite frequently add new features for a single person! The problem is that 25 people who are happy with the product and likely to share it is still only 25 people, and there aren't many features left to implement - the product is pretty mature.

I could improve the definitions, but that'd cost huge amounts of money in order to use proper dictionaries rather than Wiktionary, or I could add support for multiple languages at once, which two people have asked for but which would require a lot of dev time, and after that there isn't really much left to change.

And I've tried asking where I can find people, and they generally suggest "subreddits" (most ban self-promotion, and I've already posted on the ones that don't), and "discords" (all of them are very hostile to self-promotion).

I think the problem might be due to my landing page? People are far more likely to convert if I've already explained it to them. But I'm not sure how to convert a text explanation into the landing page form.