Hope it is not too off topic to dive into this topic further. If y'all want to throw more hate on Skorpios we can always come back to it (Isn't the ability to recur things wonderful?).
I am of two minds about saying "gg" to people.
On one hand, I don't think very much of the ritual. The mechanical nature of it rubs me the wrong way, and typing two letters to your opponent (or six letters if you are feeling extremely charitable and offer up the "glhf") really isn't a lot. And the fact that it is the same letters minimizes the extent to which it reminds me that it is another human on the other side of the screen.
And if it is such a slight interaction, propping it up as some absolutely necessary social custom is a bit annoying to me. The comparison to saying "bless you" after someone sneezes is apt. Are we doing this because it makes people happier? Makes things run smoother? Or are we just doing it because the practice exists in some real or imagined guide to etiquette.
To that end, I try to demand very little of my opponent, and I try not to get frustrated about my opponent not talking. Some opponents have good reasons why talking isn't practical for them, some of them them don't feel up to it sometimes, some of them don't feel up to it anytime, and I think that's all okay.
(As a minor aside, I think at least hitting the concede button is proper if you are giving up on a game, if only so that your opponent can differentiate between a concession and a disconnect.)
All that said, it is a reality that when you play a game of Netrunner on J.net you are playing against another human, and your interactions with them can affect them. It's a lot easier to be callous online, especially when we are interacting with people we don't know and we never see them. To me though that means I need to make more effort to acknowledge the human on the other side of the computer monitor, not less.
Personally, I find it more fulfilling playing Netrunner when I can talk to my opponent. The game is more fun that way (for me), rules confusions get straightened out faster, and I am better at Netrunner for talking to my opponent after the game about strategy and deck building options.
I know that's not for everyone though. If someone wants to not talk on J.net I hope they still feel comfortable using the site. That said, I do think we are a better community because we have people who are considering the person on the other side of the screen, and sometimes a boilerplate "glhf" and a "gg" is an easy way to do that.