... I had the 1000% free btc bonus active, and the 09908 (2nd prize) made me win the minimum quantity out of all the possibile outcomes. 1st prize with bonus or 3rd prize would have been greater 
Well, bad luck in your case. It happened to me, too, but only once when I activated a 1000% bonus. I guess a better strategy would be to activate 500% bonus on 2 consecutive days instead of 1000% on one day. With the 500% bonus if you roll a number of the second tier you will win more satoshis than the bonus applied to the first tier and you won't feel bad
