I don't think they're going to be offering that $10 credit for this game. Mostly because of the fact that it's releasing in three days and there is nothing now.
Was $56.99 for the longest time and just in the past day or two they raised it to $57.99 for some reason. And the only deal I got on it was my 10% off from my ECA code, and then I chose release-day delivery. So came to a total of like $57.xx which isn't a great deal at all, but I definitely want to get it. I have it on PC along with all the DLC and it's great so I definitely want to get it on Xbox.
As for FSSS, you can't really pay attention to the delivery date at checkout because 99.9% of the time they give you a ship date, not a delivery date. And it's usually 4-5 days in the future, and then like 10 more days until the delivery. However, those are usually just estimates and I don't go by them. For instance, I just ordered something on like the 5th or 6th I think it was, and it had a shipping estimate of like the 9th (I think) and it ended up shipping on the 7th. It also had a release date of the 19th through the 23rd but after it shipped it said the 10th (today), so free shipping ISNT as bad as their estimates make it out to be.