“It is with great sadness and a heavy heart that we announce the shutdown of all War of the Immortals (WOI) server on January 9th, 2018. On that day, your WOI character will no longer be accessible. All WOI payments from September 1st, 2017 through December 14th, 2017 @ 11 AM PT will be converted into Arc credit and allocated to your account. These credits can be used in any of the other PWE games. Arc Points between this same time period will also be refunded to your account. Your Arc credit and Arc points will be distributed before the end of next week. Thank you for your loyalty to War of the Immortals over the last six years.”
The Battle of the Immortals site has a similar message in regard to the closure and compensation. Neither gives an explanation for the cease in game operation.