This is where a lot of people get it wrong; there is no direct link between hashrate and earning. There is a direct link between percentage of network and earning, at least for the mining part of the equation. If AM rolls out 500TH and nobody else has rolled out more, then Bitcoin as we know it is dead.
If 100TH rolls out 100TH and AM rolls out 100TH (and let's forget the rest of the network for a moment) then that is the extent to which they can both grow. AM cannot add 200TH or even 2TH more and start earning more money.
If another actor adds 100TH for a total of 300TH in the network then AM can increase to 200TH but that will not increase its earnings by a single bitcent. It will only add costs, which is why we have seen the peak of AM profitability and AM cannot possibly impress anyone.
.b