Or why would anyone pre-order the digital release of a game, Sony will probably sort this out in the end though.

If you have such horrible self-restraint that you cannot hold the money for longer than a day without wasting it irrationally, than your problem is larger than a $10 discount.

As I said earlier, preorder makes sense if there is a bonus, but even then, you can get the bonus by buying one day in advance, not 2-3 months in advance.

Why loan Sony or someone else that money, when you can keep it yourself? 

I still believe they should be given the money back, as it's not a straight refund, but a price adjustment prior to purchase.

I can't speak for the US, but in EU the sale is not final until you take possession of an item, the money given is considered an advance payment, and must be returned at the buyer's request at any time before the sale is finalized, if requested. 

If Amazon can do it I'm sure Sony can

I think you're being a bit judgemental here. It doesn't apply to me but I've seen it happen with many student friends of mine. It's not about self-restraint but living in the moment. Like going to a pub crawl. The fun usually starts after the 5th pub/drink. You may not be able to relate to that, but just because it doens't apply to you, it doesn't mean that you should be passing judgement. Obviously, it's not everyone, but it is for some people. Especially for teenagers who have little self- restraint and that's fine. Making "mistakes" is part of growing up. This gives them the option to make sure they'll get the game when it launches.

"As I said earlier, preorder makes sense if there is a bonus, but even then, you can get the bonus by buying one day in advance, not 2-3 months in advance."

It makes sense to you, not everyone. What if you forget to pre-order the day/a couple of days before and you miss the bonus? (I don't care about bonuses, but some people do). Why worry about waiting until the last minute when you can do it earlier and not have to worry about it again?

"Why loan Sony or someone else that money, when you can keep it yourself?"

Because it doesn't make a difference to you? Whether Sony has my money today or the next month, it makes little difference to me; it's not like I'm gonna invest it (all £40 of it). Some times I pay bills (e.g. boradband) to my flatmates before they need the money. So what if they have my money for a month before it's neeeded? At the end of the day, I still pay the same amount.

As for me, I almost never pre-order or buy anything at launch. I wait till it's around £15, because I have enough games already. That doesn't mean I don't see that not everyone thinks like me or assume that there's something wrong with people who don't act like me.

in fear of them not having enough digital copies of course :P

Personally if it was me I wouldn't even ask for the money back. I'd feel like an idiot for ordering so soon. Also it's $10. Are people really getting worked up over that. If $10 is so much money they I don't think you should be pre-ordering games and wait for price drops.

Sorry about bad wording, I wasn't judging you personally, but "you" as people who do so. Perhaps a bit of a translation problem.

On other points, I won't add anything except that I'll never understand those people... 

I honestly wondered why in the world you can now preorder The Order or CoD, but obviously there is a market for it, and I don't have to think about it anymore.

Sony is definitely not the "white knights" ps4 fans make them out to be. They already lied about it being ps3 only, then they price it at $50 (clear money grab), then they won't give people who preordered at least a $10 refund. I'm sure people will still say it's alright because it's sony.

I pre-ordered through Amazon. I wonder if I'll get a price adjustment, or if it's just for the digital version.

Sorry, but how is $50 a clear money grab? I doubt you even know who Sony's taurget audience is with this game.

EDIT: Never mind. Just took a look at your post record. You're obviously a Microsoft lover and Sony hater.