That is true. But why did Poloniex decide to list BCN and have not taken a look at Aeon? BCN was known for cheating the community for its mine and they have faked their timestamps by making it appear that it started mining on 2012. There was also a fake story about it being a secret currency used in the darknet.
Who are the developers of BCN now?
AEON was listed on Poloniex for a year or more. BCN and Monero were listed at the same time I believe, or very closely in late spring of 2014. Aeon was listed not long after with many other cryptonotes such as BBR, XDN, FCN, QZC, Moneta Verde (I think), Pebblecoin, and probably others I'm forgetting. After a while most were delisted for lack of volume or other issues and only BCN and XMR remain.