The fact that they are adding BNB is important of course because even if its just for a while BNB will be still used and traded by the american users which is a demand and they should never be left out even if its just USA. However, the more important part I have seen in the announcement is the binance chain coins as well, does this mean if binance does IEO and they put a coin on their exchange with IEO funding going to the coins owners, Kucoin will also list that coin as well?

If that is so that right now making a new coin via IEO on binance chain is very lucrative since you get to be listed by both Binance and Kucoin at the same time from day 1 and that is really important, having those connections make a coin worth a lot more than it should and would create a huge hype for it right away.