Extremely limited quantity is likely why. Lightning isn't coming out for a few more weeks so they probably feel they have some time.
Maybe EVGA doesn't want reviewers getting them? That's a possibility after the GTX 680 Classified was almost universally panned for it's lack of overclockability and EVGA's subsequent claims of MSI cheating to allow their cards to overvolt.
I did not hear about MSI overvolting their cards to allow longer boost states. But what alarmed me was the extremely high voltage MSI placed on some of their cards.
MSI increased the cards' voltages by up to 88% which would most likely lower their life expectancy. Is cheating the right word here? I'm sure some MSI employees thought higher sustained clocks would be very appealing; but raising a chip from 5 volts to over 9 volts is very stupid.
There are regular internet people who got the chance to buy 2 cards at once.
I was under the impression EVGA would send free cards to the reviewers, like most companies always do.
Asking here is perfectly acceptable and encouraged. There is more than 1 card reviewer that participates in this forum, and maybe they can shed some light on the OP's question.