I'm trying to post using a URL (i.e. abc.com) that redirects to the final destination url (i.e. cnn.com).
The issue that I'm seeing is that the twitter card is not showing up (the twitter post becomes just a text with the URL but with no image).
I tried validating the URL using the card validator and it says it's not whitelisted. In the case that abc.com doesn't have any images to be scraped, but only the one on cnn.com needs to be scraped, does abc.com still need to be whitelisted?