Yes, coinmarkets gives me some headache as well. I am not sure if and when it will come back. I actually think it will come back, in my opinion they are just struggling and were not prepared for the traffic. It did happen before. I think if they want to do an exit scam they could have just pulled the plug, empty all wallets and not bother updating anything. Well, that's the hope.
I am not sure about the listing fees of coinexchange.io. A lot of new coins go there at the moment. Stock Exchange seems to be a new kid on the block, not sure about their fees either.
Anyway, best of luck with your coin, I will follow it closely.
What a day, some bloodbath across all cryptocurrencies ...