I must say this is an interesting situation, the company seemed to be making a killing and they invested in technology. I don't think this was an inside job.

1. Inside job, someone got strong armed and forced them to take down the network
2. Russian hackers helping Trump (just a joke)
3. Another competitor is getting ready to come online and this was the first step
4. Other miners hacked them because they had a great product and brand recognition
5. This was their plan all along
6. Price of BTC was going to jump and they realized there is more to be made from taking the BTC(New business model)