Exscudo replied on Twitter:
About EON trading on exchanges:
"We are launching our own exchange. Trading on Exscudo exchange starts in Q1 2018"
About mainnet in Q1 2018:
"No more delays"
So yes, Exscudo mainnet and exchange functions for at least EON will launch in Q1 2018! So wait a few more weeks.

Can the team give us some more information about the exchanges and which coins are listed there by the time they launche it along with the mainnet?
WAVES DEX were having a hard time to have more volume even today so I hope this Exscudo exchange will start well.