I am not receiving any address data when users are added via Paypal

The Sitelok Paypal plugin can store data from the buyers Paypal account in custom fields. For example you could collect the buyers street and store it in custom1 and the city in custom2. If you find these fields are blank when a user is added then try adding this line inside the Paypal button form. This forces Paypal to require an address from the user.
<input type="hidden" name="no_shipping" value="2">