I have contracts with GM too, would love to buy more power for mining BTC. I'm just afraid like what's happening with cex.io now.
Taking into consideration our users interests, the recent Bitcoin price drop, as well as the upscaling of the mining difficulty, CEX.IO Bitcoin Exchange would like to announce a temporary suspension of cloud mining services provided by the platform at the time of the next difficulty increase.
http://blog.cex.io/cryptonews/cex-io-temporarily-suspends-cloud-mining-services/