Unranked is harder to find because server’s default is ranked, ladder and tournament games are ranked. And if you play unranked all the time, your rank becomes inaccurate (maybe). Plus you want a little bit of stake in the game even if it’s just glicks. Additionally you always don’t know beforehand whether game will be comment worthy, usually when I’m already in a game, interesting things happen or not.
I think it’s OK to chat during ranked game because social aspect of the server is more important than a small possibility of maybe (but probably not) inadvertently giving opponent a good idea, even smaller possibility that this idea will allow opponent to reverse the game, and even smaller possibility that this will change the ranks significantly.
And Malkovich doesn’t work because it would be nice if opponent responded and we had a nice little chat.
I believe there’s no real reason to enforce the rule in this interpretation. Chatting about past opportunities in the game hardly ever if at all change the game outcome. And if it does in that very small number of games, so what? We aren’t giving money prizes and rank will self-adjust just fine. And if it changes the game’s outcome against chatter’s favor, then it’s his fault anyway, so it’s a fair game.
I really doubt there’s a lot of players who want this rule in place. They may be against chatting because it’s distracting but not because it’s “assistance”. I’m very sure that most players don’t care and if they want to comment they will, and if they don’t want comments they ask opponent to not comment.
I also have a feeling moderators don’t get many complaints about opponents dropping an alternative variation, but here I’ll have to ask you how is it on the modering front.
Additionally I would argue that chatting in in-game chat can’t be “outside” assistance so it’s not exactly prohibited.
Now, if breaking this rule doesn’t hurt anyone, players don’t care about it, it’s not enforced (as far as I can see), and it’s not strictly in the rules, do we really need to interpret it in this way?
To the last your comment. It’s not allowed because it’s distracting your opponent, not because it’s “assistance”. And let’s be real, OGS ranked is not the same as a real life tournament.