Given up on trying to tell Paypal support that the handling of SSL queries for this domain is broken fubar. Shibboleet
Support tell me it is defunct, Paypal probably ought to fix their documentation and code snippets and decommission it, rather than just leave it in a mess. Still it hurts them not to listen more than it hurts me, but sometimes it would be nice if that code word worked.
37 seconds for a 403 from https://images.paypal.com/
(the 403 is fine, it is the 37 seconds that hurts).
If you are a paypal engineer, or know one, you know what to do.