Let's test it: is this blocked? https://outline.com/99a78v

What about this (expires in 7 days, but does require an actual download. It is a FF screenshot of the BBC page): https://send.firefox.com/download/0fc126b73012ee50/#o_bILCxP...

I'm curious, because if they analyze these links (or even this message) I figure it would be easy to identify.