Sort:  

Just did minimum withdrawal 0.005btc [10days later]

You get the option to convert your BTC into more hashpower. They give much more hashpower this way than through the Buy option

10 days since last withdrawal
it has generated another 0.005 ready to withdraw.
converted it to more hashing power and received referral bonus on original account for purchase (convert)Screenshot_20180918-145000.png