they advertise/tout you can use your account on multiple devices, but that is definitely not true.
The system they have for account sharing is a little strange, at least with the family plan, where instead of having everyone on one account (like what netflix does/did) you instead have to link different accounts to the one that pays for the subscription.
As far as I know the joke is based off the flat earth conspiracy which says that Australia can't exist and therefore must be on the other side of the flat earth
Honestly same, I just know that the speeds were better when the port forwarding worked.
I think it just makes the service visible to devices from outside the network which helps them form a more direct connection. (That's just an educated guess though)
Using the *arrs is pretty convenient if you know how to use docker (or even if you dont) and then you can connect them to Plex or jellyfin to view, it won't be instant like Netflix and co but at least its free/cheaper (cost of VPN or seedbox). You can even setup overseerr or jellyseerr to simplify the movie/show requests.
Radar can track whole movie collections if that's what you mean, alternatively there is a list function which might do what you need(I've never really used it though so idk)
And why would Israel listen to that?