The extra coins will be credited to your Poloniex accounts on or before coin launch.
IPO closes in 3 hours; Coin launches in 23 hours (2 PM EST)
WOW that's cool is it good time to buy some more now then before it closes?

Just be aware that going into promo hype mode before the ipo is actually over isn't in yours, or current investors, best interest. It's too far away from selling out for demand to be the path to profit. You need to base it on the proportional split after the ipo is over.