This is the Government going after AirBnB's as most AirBnBs pay through PayPal. They are specifically targeting people who earned over $30,000 in 12 months as those people are required to registered for a GST number and collect and remit GST to CRA.
http://www.bnn.ca/paypal-ordered-to-disclose-business-account-information-to-cra-1.916791