Scammers are using stolen credit card data to set up fake websites that charge a small monthly fee that you may never notice. Here’s how to protect yourself. Researchers have uncovered a widespread credit card scheme that has gone undetected since 2019. Amazon Web Services, Mastercard, and Visa could potentially be unknowingly participating in the scheme, the firm says. The company''s cofounder says people should be proactive in checking their credit cards for unfamiliar charges. Cybersecurity researchers say they have uncovered a massive, multi-million dollar credit card scheme, and major companies like Amazon Web Services, Mastercard, and Visa are all potentially unwitting participants. Consumer-facing cybersecurity firm ReasonLabs uncovered the scheme , which they said has flown under the radar for years by charging small enough monthly subscription fees for generic-sounding services to go undetected by scores of victims in the US. ReasonLabs says the scheme has been operating without notice since 2019 and has reaped fraudsters between $10 million to $50 million per year. How the scheme works The operation appears to have gone undiscovered largely due to its complexity.