Try and pick a point where you have a few team members on.
For example: https://www.reddit.com/r/IAmA/comments/36myvo/we_are_the_team_behind_cities_skylines_ask_us/
Besides just being listed in the body of the post, they have “flairs” by their names in the comments that the moderators of that subreddit set up, I believe.
Or you can coordinate on discord or whatever and relay answers through one account and sign them -Flavien or whatever
Don’t rush. If you can’t have it set up to be good in time, wait until the next weekend or whatever. You can’t just make one every day until it sticks. So if it sucks and doesn’t take off, that’s bad. But once you set it up make sure you have a few hours to answer the questions. You don’t have to answer them all, as there could be hundreds and many duplicates.
Also, this isn’t just about I:B. People can ask you anything and you should answer them usually if they are highly upvoted. This isn’t just about promoting the product with every single answer. You have your links in the opening post for that and you don’t want to rub people the wrong way.
IIRC Elon Musk did an AMA and he is arguably the most natural AMA-type CEO in the world. Could be useful to check out how he did in his.
I would emphasize that even more. Because a bare number just doesn’t trigger the image it should. The image is that each single server can host multiple times as many players in a single seamless world as any other current space sim [IIRC!]. That’s a fuckload of players, and a mind-bluescreening volume of space to have your own personal space opera in with all of your friends and all your friends’ friends, in that single server.
Also one of the talking points ought to be (in some very eloquent or concise way) that the hard part is done. The sandbox (1:1 seamless game engine) is ready, now it just needs to be filled – ships, FX, more gameplay mechanics, etc.