I'm am currently reading the Sia announcement thread -
https://bitcointalk.org/index.php?topic=1060294.0All 367 pages. As far as I can make out there are updates coming soon and they sell their own mining equipment.
there is something behind this.
Thanks for the link. interesting why they sell their mining requirements ? Meanwhile I saw some one has said that they going burn some of Sia coins, it will reduce the supply and eventually it lead to rise the price of Sia.