I think forcing all posts to be opted-in to the search, and depending on users to opt-out, would be far more controversial? Either way, the user does get to control this within the platform.

There’s also a really nice deep dive into the updates here.

I wrote a blog post about using Postmarks and contributing to the project https://andypiper.co.uk/2023/09/11/bookmarks-in-the-fediverse/

At the moment it is explicitly designed as a single-user implementation, although I’m sure it could be pivoted to become multiuser. I’ve simply set up my own on Glitch and it is working great! -> https://pipesmarks.glitch.me/

understandable! No problem, just thought it could be useful, but realise you should make those choices carefully.

You can use the Graze browser extension that will help with this.