However this might help:
To thank all Binancians for their ongoing support of Binance, we will be extending the end date of the zero trading fee period for the BNB Market to 2017/12/15 04:00 AM UTC (previously scheduled to end on 2017/12/01 0:00 AM UTC).
Thanks for your support!
Binance Team
2017/11/30
Not sure if this is referring to the purchasing and trading of the BNB coin or if they are referring to the entire exchange. If it's the coin then there might be some last minute trading to buy some cheap BNB