Nope, 2 I payed for, 2 I got from that minecraft giveaway. The 2 I won were just when I felt like trying for that give away. Purely luck. and I bought my two minecraft accounts ages ago when it was really cheap.
so at best you assume that he has that much.. so that would be all 4 accounts at gold.. but one would be safer to assume less than more so even 2 at gold and 2 at iron, or even 3 at gold and 1 at iron or a combination of the such.. but deducing that there would be more is never sound.