Not sure I’d quite call it victimless. We use the choice of who or what to commemorate on cash and coins as a way to culturally recognize the collective value we as a society place on people, places, events, etc. By hijacking a new coin, Trump is removing our ability, at least for a time, to celebrate someone or something more meaningful. It’s a kind of softer victimization, but it’s not harmless.

I think the practice is more common with proper nouns and abbreviations. I’d take the underlying principle to be “proper noun and/or abbreviation is special, and we can’t just tack on extra letters as we would with other stuff, so apostrophe to the rescue”. To be clear, I am not agreeing with this, it just seems to be the driving logic.

checks the votes on our respective comments

Thanks, I will!

That’s not how any of that works.

You didn’t, perhaps, mean ammonia?