The rewards exist independently of the Amazon account. As I said earlier, the OP can gift the rewards codes, sell them on eBay or - heck - ask someone he knows with an Amazon account to buy something for him.
The only two grips the OP has (besides the account closing, of course) is that he no longer has access to his purchase history - which is by and large his fault - and he can't use the Amazon rewards he earned - when, in fact, he can.
You seem to like to comment on things you know little about. In fact, I cannot use my rewards because they are in my account at amazon. There is no way to access them or use them, or gift them to anybody. When I get my certificates, I always put them into my amazon account so that they will be readily available when I make purchases. Once I've done that, the paper certificates are used so I just throw them away.
Secondly, we live in a digital age. Amazon offers a wonderful purchase history/archive service where it is easy to search and locate by date/year, print out and otherwise find old records. Keeping paper receipts for tons of books, electronics and what not doesn't make any sense. I've never ever been banned from a store before and naturally couldn't have predicted that I would banned WITHOUT THE OPPORTUNITY TO USE MY CREDIT AND ACCESS MY RECORDS. I don't think that is short-sighted at all. I do have some emails and old receipts, but only some of them.
Boy, people are cynical here. I frequently upgrade my and my girlfriend's computers (sell the old ones on craigslist) and over the past few years I've also bought computers for my parents, a few of their friends and few of my own friends - I've put it on my credit card for their convenience since I was helping them switch to macs and they gave me free hands to get a system for them. I'm an academic and photographer, not some kind of sketchy reseller that uses amazon to make money.
Anyway, all I wanted was:
1. A fair warning after years of being a loyal and very frequent customer.
2. Access to the records I stored in good faith on their site, i.e. receipts.
3. Access to the credit I EARNED through my credit card that Amazon has simply stolen from me.
4. Not being treated like a criminal.
It may be that Amazon hasn't made money off me for the past two years (which I doubt), but that's an extremely short-term perspective. If this hadn't happened, I would have ordered a $1300 lens this week and I would have continued buying things regularly from them, most of which I would not return. In the long run, they would have made tons of money off me, not to mention off all the friends I would continue to recommend amazon too. Many of my friends have started buying all their expensive electronic purchases from amazon and I would have continued to promote amazon.
Anyway, you guys believe what you want and if you think Amazon is handling this in a good way, so be it. I don't agree and could never agree with that. No matter what the outcome is, I will never purchase another item from Amazon and I will cancel my Amazon credit card too.