If I were Apple, I would have some kind of fanclub (ok, fanboy club...) subscription service. Here's how it works, if you spent $X,000 on Apple products in the past 3 years, you can join the club, and you get token benefits like free iCloud 50 GB, some exclusive emojis, some email newsletter from Tim Cook, etc. What you also get is the opportunity to cut to the front of the line to pre-order ONE (and only ONE) phone or watch per year, which will be the SIM free model. This way Apple gets their product in the hands of their biggest supporters and probably avoids most scalping.
I don't know if they will ever do it, we're the minority here -- people willing to pay $999+ cash for a phone on launch day. But don't think your voice (and money) isn't valuable, let Apple know that you want to buy their product (if they would only sell it to you without having to jump through Verizon's hoops).