Around 20 millions (guess number, 50% of blocks are from POS), POW ends at block 450 010.
I really like a lot about this coin but it seems so strange that the max supply is not described anywhere. The first page says that POS will continue 'forever' which cant be right and scares me.
After block 450 011 BSX will be pure POS coin with reward 50% interest per year up to block 1 000 000 (block 1 000 000 will be reached in one year from now).
After block 1 000 001 BSX will be auto switched to reaward POS 10% interest per year forever.
First year = 25 M (up to block 1 000 000)
Second year = 27.5 M (+10%)
Third year = 30.25 M (+10%)
etc....(with every new year + 10% coins)
(We will update OP about max supply)