I found the coinspot exchange crypto and tax info helpful. Bottom of there main web page under learn if your interested. No log in necessary.
My unqualified personal interpretation is any upvote rewards might be considered as gifts from within a loyalty program similar to flybuys or Qantas frequent flyer rewards and all hopefully not taxable. Maybe this wishful thinking but as you say they might have to come up with some clearer rules that hopefully only effect future earnings.