Sure, you can look for mitigations. In the course of looking for mitigations, wouldn't it be nice if someone let you know that the idea you'd come up with as a mitigation was not going to work?
I've given my suggestion in other comments in this thread. In short: if you don't want your comments to be seen by all, then don't post them on a public forum that uses an open protocol specifically designed to broadcast your comments to everyone who cares to listen. Perhaps use some closed-off forum instead, preferably run by a large and litigious company that guards its possessions jealously.
That article's proposal is incompatible with how the Fediverse works. It proposes licensing models for viewing, printing, and copying, but all of this hinges on the content being delivered in a protected format that enforces those restrictions. It describes using encrypted “software envelopes” that check with a central server for authorization before allowing access. If content is freely accessible without technical restrictions, then legally, it’s considered published and available to the public.
I am never going to ask you for a license to read your posts. Go ahead, sue me.
They're just using very simple scrapers that don't have any knowledge about how the site operates. The simplest counter would probably be using Anubis on the web interface.
I wouldn't mind waiting 2-3 seconds when first loading the site and mobile apps would remain unaffected since they use the API.