Poloniex is not a necessity for Iconomi.
If it's listed there, it would be beneficial for both.
Did you see Round which has reached 12th position on coin market cap. It has grew over 250 times in some months. And it is only listed on Liqui. Although, this seems strange as Round is not as popular as Iconomi. Do you think these are fake trades on Liqui to pump round?
I can agree Poloniex is not a necessity for Iconomi to succeed or to gain a substantial increase in price.
Though it would be nice to have ICN listed on some other decent exchange like Bittrex to distribute the trading volume, at the moment 84% of the trading volume is on a single exchange i.e. Kraken.