what sounds more appealing?
 

Make $6 per sale.

-or-

Make 50% off of all orders.

50% of all

For the simple reason that by telling people they will only make $6 per sale they automatically think that is the most they can make whereas if you tell them 50% of all sales they havent got a set figure to work towards :thumbsup

Marketing 101

Make 50% off of all orders.

50%

actually, I meant $6 per item, not order.