The relevant bits:
Pieter Arntz, a malware intelligence researcher at Malwarebytes, has issued a timely July 16 reminder that “scammers are impersonating Amazon in a Prime membership scam.”
The cause of Arntz’s reminder, and the underlying Amazon warning to all 220 million Prime customers, however, was a spike in email attacks claiming that subscription rates are about to rise, along with a cancel subscription button that would lead to Prime account credential theft.