You've probably heard that Paypal will start selling your personal data in November. Opt-out by turning it off:
In the EU, I found it under Settings > Data & Privacy > Interest-based marketing.
Elsewhere it has been found under Settings > Data & Privacy > PayPal Shopping or Settings > Data & Privacy > Manage shared info > Personalized shopping.
(Copypasted from someone's non boostable post with their permission.)
