As a bit of compenstion for the downtime Binance are cutting trading fees for a while.
"To show our gratitude for your unwavering support throughout the upgrade process, Binance will provide all users with a 70% discount on trading fees (0.03% on all trades, 0.015% with BNB) until 2018/02/24 00:00 AM (UTC)."
https://support.binance.com/hc/en-us/articles/360000737572-System-Upgrade-Complete
https://twitter.com/binance_2017?lang=en
I still can't get it.
One way or another it was too bad for Binance. They just show it down and did some works. And they postponed the opening time again and again.
Hope we won't see it again, at least like this way.