I am a little confused about IEO in poloniex, there are many people complaining that this is a fake game. A lot of people have complained that they cannot participate in this IEO and it was sold out quickly. It is better for us to choose bigger exchanges like Binance, MXC.com ...
Every big IEO exchange really works like that. Maybe they dont run yet lottery like other exchanges. How come MXC becomes a big exchange? As far as I know this is not good exchange too. I just realized that they conducted IEO when just project has been launched. Poloniex is an old exchange even though they are just new to IEO and this is their first time, I know that they still have a lots of investors and traders that will joined even their upcoming IEOs.
For OP, I dont know if ICOs still working anymore cause most project prefer IEO now, cause the investors does not really have any interest due to lots of scams happened in the past.