Why is trading disabled on RoboForex?

RoboForex has disabled all trading for the last 3 days. I tried contacting them and here is what they said:

"We have received the latest info that this situation is temporary and is connected to the execution on the side of the liquidity providers. Now we are looking further into it and checking the details. Now trading there is in "close only" mode."

Then they said:

"The сTrader platform is indeed currently operating in the Close only mode. It is not a restriction placed specifically on your account. There is currently no information in regards to the resumption date, but you are welcome to try our MetaTrader and rTrader platforms in the meanwhile."

Can we have a deeper explaination why the broker would do this because this relects badly on cTrader?  They are essentially tanking your platform and sending customers over to your competitors.