The most common thing I'd want to do with location information is display it on a map. For instance, I'd love to use this to help coordinate meeting up with someone, so that we could each see each other on a map. I'd also like the client-encrypted private historical record for a variety of purposes; everything from "what path did we walk on that romantic evening?" to the mundane "where did we park?" or "where did I leave my phone?". All of those need map integration, and that map integration needs to not compromise the privacy properties of the location service. That would be well worth paying for.

The issue is that I wouldn't want to use a separate mapping application for that. I don't want to use Google Maps for directions/navigation/restaurants/etc, and a separate app for location sharing. I also don't want Google Maps to have my location information/history. I'd pay for an all-encompassing map service with this feature, and privacy would motivate me to happily pay for that even though Google Maps is "free".

But I can't honestly say I'd pay for just the location feature if I still have to use a different (and non-privacy-preserving) mapping service for everything else. If I can have a single "Maps" application on my device, and that application preserves privacy, I'd love to pay for that; if that app also has location sharing, that's even better.

Messaging or Signal integration would be for the same kind of "meet up" purpose: send someone a link that gives them time-bounded access to a subset of location information (most commonly live information about current location).