A co-founder of Sun Microsystems has advice for Facebook users who are unhappy with the social media giant in light of the privacy scandal that exposed the personal data of more than 50 million people: Stop using free products if you want to protect your personal information.

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“The important thing about Facebook to remember is that if the product is free, and there’s a lot of free services out there on the network, you’re not the customer, you’re the product,” Scott McNealy told FOX Business’ Charles Payne during an interview on Thursday. “Your data, your information, your profile is the product.”

Facebook come under fire last week when it was revealed that political consulting firm Cambridge Analytica gathered the data of 50 million Facebook users, which was then reportedly used to influence the 2016 presidential election.

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