When a user searches for an article on Google and clicks on an AMP link it never leaves google.com, even if the AMP link is an external entity.
Repro:
1. Search for some BBC news on google.com, click on an AMP link and load a BBC page
2. Notice that you're still on google.com and not on bbc.com
Repro: 1. Search for some BBC news on google.com, click on an AMP link and load a BBC page 2. Notice that you're still on google.com and not on bbc.com