Facebook isn't doing anything special here, I believe this is what the majority of stores are doing, include the Apple App Store and the Google Play Store.
In fact, I'd be curious to know which virtual stores do not do that.
AFAIK Apple will never lock me out of my App Store purchases and demand to see my passport
Microsoft won't take away the Xbox games I purchased if I use a pseudonym on LinkedIn or post Hacktoberfest spam on github
Steam won't ban me if I have separate accounts for work and personal use
etc
If having a Facebook account was less onerous and didn't come with as much overhead (for example, FB has banned people for making an account and not using the social features) I think people would be less up in arms
No appeal, nothing.
What can I do?
What kind of gift cards were you buying? The Visa/Mastercard ones?
Then they emailed saying that my account was accessed by unauthorized party and killed the account. Told me to open a new one.