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.

1st quarter of 2018 means From January to March 2018. So meaning to say there's a chance that they will release by March 2018. But hopefully they will not do that. Maybe if this happens another disappointment from co-investor, why they too long? Its almost a year to done the mainnet .