Simple reason.. those were sold by company who don't want any Terons Anymore. It's the very same Terrasoft Solutions that was supposed to sell Teron motherboards (and considerable cheaper price than identical Aone) but they pulled out about a half year ago.
Officially there has been no explanation (nor do they need to give any) of real reasons behind this but after seeing all these delays, (and other claimed issues) on Mai Articia-S based systems it's no wonder they gave up on them,.