While there's no real obligation to use affiliate links, it gives coupon-posters incentive to keep the coupons flowing, and it's a nice way of showing your appreciation for someone who just helped you save $5/$10.
A bit of a break from the $10 coupons; I just posted a $5 coupon code on the Play-Asia coupon blog: LU-GBA-PYN
Don't worry though. I have more $10 coupons on the way. Enjoy!
Yeah, unfortunately not all orders come with a code for some reason. I've seen it happen a couple times also.
There's another code for $10 on the Play-Asia coupon blog by the way: KN-LTX-ALB
I'll post another one on the blog later today also.