Just got an email now $180 off using referral link for new customers sign up.
$140 off first box
$20 off second box
$20 off third box
Keep on scrolling through referrals to find $180 off
(Note: While OP indicated this referral campaign will end on 1 February, we found the $180 referral links expire very quickly. For instance, OP's own $180 referral has expired in less than 6 hours.)