Like Technomage said this is not a solution to the problem. We will not know how much network share cex.io accumulates with them pointing their miners at other pools which is not better than current situation. If this goes on we would have to trust cex.io to keep bitcoin secure. Security of bitcoin lies on the decentralization of the network and not on a single entity, you shouldnt need to trust anybody in a decentralized network.

Please help improve decentralization of bitcoin network. If you want to reinvest your bitcoin, you will only lose money buying mining shares. I have shown this a few post back, you can calculate it yourself with the historical trade data.