So I think this is being over ambitious via over reaching into too many social media means for the size of the staff headcount. Each added social media pathway adds more users but then you must add staff to then interact with each medium.
The likes of this forum, Anker created it but they didn't add any staff, it often takes 24 hours or days to get any @ankerofficial reply, the moderators reply faster but often in hours. The forum, like say Facebook and Twitter are places for people to ask questions, but the reply, when it eventually comes, is usually to email email@example.com . i.e. the very existence of a FB page, this forum, and the Twitter page adds delay and adds effort.
That flash sale did not become unavailable instantly, it took about 20 minutes. The issue is they sent it an email list they had grown so large that it is inevitable they'd run out of product very quickly.
The Anker social media manager is Lawrence and it is usually Annie who replies.