What are the common signs of a vanilla card scam and how can I protect myself from falling victim to it?

Common signs of a vanilla card scam include unsolicited requests for payment using vanilla cards, pressure to make immediate payments, and promises of large rewards in exchange for purchasing vanilla cards. To protect yourself, never share your card information with unknown individuals or companies, verify the legitimacy of any requests for payment, and be cautious of offers that seem too good to be true.