Slotastic, a sister casino of Jackpot Capital,
offers new players a whopping $500 free in bonuses:

$100 Start Up deposit bonus for your very first deposit
$200 deposit bonus for the Paycheck of the Month
$100 deposit bonus for the Slot of the Week
$100 deposit bonus for the Progressive of the Month

Have a Slotastic time!

You can read all details and the terms and conditions of these cool bonuses here.