User blog comment:Lapo90/Battle Nations officially shutting down/@comment-222.131.58.73-20160728024509/@comment-26918877-20160807040903

Probably because the devs (who are probably working at King now) are focusing their attention to Rise of Tyrants now. From what I can tell, RoT is BN without those cool promo units. (BTW, their wikia is junk. Someone ought to fix it up.