I know this question has been asked probably 100 times throughout this thread, and I don't have time to look through it all to see. What would the average price of btc need to be for CEX.IO to reimplement cloud mining again? $300USD per BTC? Thanks for the responses.
They said a price of US$320 is needed to make it profitable again. This was said a few months ago though, so it could be either lower or higher by now.