$800k actually. Defaulting and taking the cash is simple. no mus-no fuss for easy $600,000 profit. The company can also pay back on time, so he gets 12% interest, then he could re-loan again right before the deadline, default, and get the $600,000 profit, in addition to the 12% ($24,000)
Of course, if Yaz continues to lend more than $200,000 to MYDX, the gains increase 4x (300%)