If you spend alot with paypal go and check your email attached to your paypal account (in gmail it will be in promotions tab), paypal sent out invitations to "PayPal Select", there are some good offers in there, for example right now there is:
$10 off $50 @ target when you pay with paypal
$20 of $100 @ wayfair when you pay with paypal
$25 off $250 @ overstock when you pay with paypal