allow ?
What does it mean

two teams (let's say same level)
- in the same server > can be friends sending a request during a game of a common friend or a competition game, can play in the same competition, can support each other, can trade players

- in different server but fb friends > can support each other

- one of them is from fb and the other from google account > cannot have any contact except playing in the same asso group (if one of them can find the code of the asso group and send a request to join).

- oppo bidders with the new auctions system can be from different servers.
With the old system, all were from the same server.

Clubs with nego players we see, are only from the same server.