I'm pretty sure ZZ is thinking there is some advantages that Ken can take over the failings of Hashfast.  I'm not sure what those would actually be, because Hashfast owes people orders/money.  So Ken can't turn out replacement Hashfast boards if he hasn't been paid.  And he can't afford to buy them and their debt out.  Maybe he could sell to future orders, but I think getting into bed with Hashfast could be a huge mistake...