I think it is odd that Apple wouldn’t cover a scratched screen under AppleCare+ since a big scratch in the screen vey much seems to be accidental damage. Even more interesting is, that I just this week had my S7 replaced due to an ugly scratch on the display under AppleCare+. I just started a support chat last weekend, told them I had a scratch and wanted the display replaced under AppleCare+, they initiated an express exchange, I received a new S7 within 3 days and my repair case has been closed by now.

Also: it’s a stainless steel model. They do scratch.