WhatsApp users just got a taste of the old dictum, "If you're not paying for the product, you are the product." And not everyone liked it.
The messaging giant announced on Thursday that it would share its huge database of users' mobile numbers with Facebook. The social media company announced in 2014 that it was buying WhatsApp for $19 billion, a deal that later grew to $22 billion as the value of Facebook's stock rose.
According to WhatsApp, the move was to help its parent company show Facebook users more relevant advertisements and friend recommendations.