Bitcoin hashrate today: 250 Ph and flat
https://blockchain.info/charts/hash-rate?showDataPoints=false×pan=&show_header=true&daysAverageString=7&scale=0&address=

BitFury: 100 MW with .2 J/Gh = 500 Ph

If BitFury wants to roll out 500Ph and control less than 51% they need to:
 - 1) either have the network reach 1 Eh, therefore they need someone else to add another 250Ph
 - 2) either start selling and shipping their hardware / chips, in which case the 100MW argument becomes irrelevant.

Let's go with 1), 250 Ph / 1 Eh = 25% of the network

Who is going to sell / own those 250 Ph?
Seems in line with AM's plan.