ok, your trigger is only set to use the Today is before a certain date option.
you need to add an additional trigger for :
Subtotal of items with a specific column value:
if the number of items where the column"earlyDiscount" has a value of "1"
and in the calculation use, based on items with a specific column value:
Total of "Quantity" where the columns "earlyDiscount" has a value of "1" "times" "10"
this assumes you have the add to cart buttons set up so that the column earlyDiscount is set to 1 for items that the discount should apply to and 0 for items it should not apply to.