Personally, I would like to see some kind of volume threshold where it is deemed not to be spam if it's a targeted message sent to a small number of individuals. (slaw.ca)
Currently, that percentage goes up whenever an affiliate hits a new volume threshold. (inc.com)
Also on December 6, 2017, trading volume for BTC nearly doubled from 6.9 billion to 12.7 billion and crosses the 10 billion volume threshold for the first time since Bitcoin crossed $ 10,000 (November 28, 2017). (bitcoinmagazine.com)