Seems like these games are a long term commitment, as most games are 1-10 days per game-tick.
I've heard about the 'offline' version of this game, and the main goal was to actually play out the diplomacy part IRL: do a bit of lobbying, being (overly) nice to somebody, trading territories.
I don't see how this web-version comes close to that - to me it seems like slow paced Risk...?
Well some people play "gunboat" versions which have no diplomacy at all. I don't really see the point and don't do those ones. Otherwise there is user-to-user messaging, and global messaging. It's not as good as face-to-face but it totally works regardless. You will have many shaky truces and backstabs.