I have a visa credit card and received this email.
I don't want to use my debit card with amazon particularly.
You get a few added protections by purchasing with a credit card, and a mistake can't drain my current account in the same way as it could with a debit card, plus I get the benefits of a month or two credit for "free".
If I'm "forced" to use my debit card, I'll have to for essential purchases but this means that I likely won't be buying much more from amazon in the immediate future where I can find an alternative.