I have one of these yellow screens on my Model S. Tesla told me twice over the past 3 months they would be replacing it under warranty very soon. I'm disappointed to hear they're walking this back.
People who bought an iPhone shortly after launch paid $600 with no idea that the app store would appear and become what it did. For all anyone knew, the iPhone would go the way of the Newton or the Zune. Two years later, the same phone was retailing for $200 with a proven track record and an exploding ecosystem of apps.
What being an early adopter doesn't mean is that the item may not be fit for purpose. If early iPhones had never taken off, and the product line was cancelled, that's your bad luck; you took a gamble when you bought it. If the screens had just not been rated for mobile use and had leaked LCD fluid into people's pockets, that's not part of the gamble.
Tesla's appeal to early adopters, but that's not an excuse for product defects.
I remember paying $300 at launch I think...that was the AT&T locked one but back then it was easy to unlock.
The $600 ones weren't available until much much later when they started selling off contract unlocked phones directly.
I only started paying more for iphones later (off contract, unlocked, from China, etc...).
Source: https://www.nytimes.com/2007/09/07/technology/07apple.html
Further more, it seems to be relatively new screens that suffer from the yellowing problem. It doesn't seem to be a common issue in Teslas built before 2016 or so.
I paid the $6 and sent mine USPS certified return receipt just to be sure. I recommend you do the same.