I think the main thing is to be consistent with the posts about it and creating that buzz before hand. Like before launching you need to be in storytelling mode about the product for at least 1-2 weeks on social media, so when it happens its embraced.
Thanks for asking @hesh_fekry, we hit most of our goals with the launch + a lot of fun with the team since we got together for the full 24 hour launch.
There’s a main takeaway that I would add to your list. Activating audience based on the time-zones is something you should plan ahead.
For example at 00:01 Pacific time the European audience is up since it’s morning so it’s good to segment the messages based on that.
Later in the day the US audience came online and pushing on them to interact makes the momentum going.
And finally the Asian audience picked it up later in the day.
Since there’s a 24 hour period I think is important to take into account the time-zone of the audiences you want to activate.