No discount. Actually pay the seller a bonus for opening the door to a neat world of holey kites and holey controls of kites. Those pin holes are just the beginning of a great adventure in holey kites and their actions. Holes may be kite blessings:
The family of "breathing" kite covers:
Yes, the elastic seams that open to Hook's Law may be judiciously placed in kite covers for some over-pressure release.
The very ageing of kite covers brings on increased porosity that soften the flights.
Porosity control of kite covers is in the literature. Sensors and reactions could let a flight have the porosity wanted. Oscillations via porosity changes: close and then open, etc. Such may be a means to drive a working AWES for cross winding or for tether-tension oscillating.
Holey kites with controls at some holes is a strong part of wing design in aviation. Slots, slats, tunnels that communicate from bottom of wing to top of wing, etc.
Have graded porosity in a fabric wing to give flows that meet wishes.
Judiciously sized and placed holes in kite cover has long tradition. Purposes vary. In some holes: place rotary turbines for decoration or for generation of electricity. Judiciously slide hole covers over holes and release for various actions.
Suction? (inhale) ... by shape logic or/and powered devices
Blowing? (exhale) ... by shape logic or/and powered devices
Virgin design of a kite cover may specific the amount of porosity wanted.
Cellular kites ... full of holes
Tetrahedral kites ... full of holes
Vents in sleds ...
Here is a neat holey kite: http://www.flickr.com/photos/84685967@N00/3922958158/
Put some reinforcing about a hole; set up a control flap that can cover the hole and uncover the hole; obtain a control of the kite's flight by such method.