Dabling,
If you looked at how the proxying works, you'd realize that it actually provides folks an opportunity to get a CPK without the markup.
The folks gracious enough to make the attempt for someone else are doing so to help someone else obtain a CPK, who otherwise may not have a chance (several of us work jobs that always have us on the road during the sales. Others don't have a decent enough connection to have a chance).
The folks willing to proxy either already have the model of knife in the sale (and know from past experience, that they have a decent chance at getting in), aren't looking to purchase this particular model, or even on occasion, willing to give up the opportunity to someone else, while waiting for a later opportunity to buy one for themselves.
The proxies are simply reserving the spots for other members, and they aren't upcharging to do this.
The higher prices you see on the secondary market tend to either be 'catch and release', or folks who bought 2, with the intent of keeping one and selling the other, so in effect, the proxies actually take spots away from that during the sales, if anything, as most of the folks asking for someone to proxy for them, are the ones trying to get one for themselves, not to resell.
P.S.
BTW, while not necessary, showing support for the site with a membership also tends to make folks more likely to offer to proxy for you. It's a small friendly community, based around a great little company.
(I also need to learn to keep my trap shut about the company until I've acquired all the CPKs I personally want lol

. I can't help myself though. Every time someone asks for a knife recommendation, I refer them to the CPK vs nails and concrete videos and then there's more competition).