Bitcoin ABC is forking off eCash (XEC) miners, who would have imaged.

It looks like ViaBTC is dropping XEC to avoid the ABC's hard fork. https://www.bitcoinabc.org/

ViaBTC's anointment is here:
https://support.viabtc.com/hc/en-us/articles/16019305990031-Announcement-on-the-Discontinuation-of-XEC-Asset-Management