Hi, does anyone know when it distribution of the airdrop tokens happening?
If you mean by the picture from the BTC wallet, it is usually from Sunday to Monday. (provided that you applied before Sunday)
Is the SEMUX mainnet already live? And are there any major exchange listings to be expected? Or can I only buy and sell over the counter atm?
Yes. Mainnet start ai 20/01/2018 everything is fine. As for exchanges, I understand that there is a process of discussion, exchanges will be, but you will not be told the exact date, approximate dates Q1-Q2 maybe. Buy-sell in discord, channel #traiding. The link is at the top, a couple of posts above