Thanks! Text comments, redaction and flattening are definitely features I'll add.

One way it'll avoid enshitification is that I have no VCs or anything like that, it's just me. So I only answer to actual users.

My hunch is that while PDF editing is something people commonly do, most people probably don't want to pay for it, at least for basic features. My plan is to add Google Adsense, but in a way that is non-obstructive/intrusive.

Depending on feedback, I might add a paid plan for much more advanced features if there's demand. But all the features you mentioned that are missing, as well as all other basic features, will always remain free. Since all the editing happens in the browser, it's a win-win for privacy and lower resource utilization. I just have to render the webpage. It runs on a low cost VPS, so it costs me almost nothing to keep this software running. Given that, there's no current or future costs that would give any reason to remove free features.