Board Game Arena

Qu'est-ce que les "messages globaux", le chat qui ne semble associé à rien et duquel je ne trouve pas de documentation ?

That's a general chat for all players (as you understood, not associated to a game table or to a group of players). Most of messages there are people looking for players to fill a table.

You need a premium account to post there, and I think under a certain age players cannot post there either.