Information: About Gift Card Scams - Official Apple Support
Why no reimbursements? If somebody were willing to reimburse folks that got scammed, large numbers of people would then claim to have gotten scammed, so they and their associates would then have both the value of “scammed” gift card and the reimbursement.
Scamming people is a business, too. Those gift cards were drained immediately after they were received by the scammers. That money id long gone.
Here are a very few other of the many other sorts of scams: Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support