Buying bulk or one by one?

Hey guys, would it matter if I purchased in bulk or one by one? (Like, is there a discount like vBulletin.com does things?)
The reason I ask is cause I'll have three vBulletin licenses in total soon and decided I could use vBSEO.

Thanks

please see: Bulk Discounts on Multiple vBSEO Licenses
for more info

Your first bulk discount will occur when you purchase your third license ($10 off).

You can purchase 1 by 1. Your bulk discount will be applied based on the total # of licenses you own.