Are #hashtags and $cashtags (planned to be) functional here…

Definitely, but there could be a market for them

You mean topics and stuff?
There will be increasingly more functionalities, yes. Some are for catching up existing socmed practices, more powerful recursively innovative are into planning.

Yes to everything.

Please please please make it this way:
#hashtag is cheap or free to use or search
$cashtag is unspammably (algorithmically) more expensive to use or search
Later: bolt-on comparative #/$tag analysis to target low quality posts and promote higher quality

hnnnnnng.

Good sense for curation of content in your proposal 🙏