AM already has reached the peak it can safely operate. If AM is at 40% and one or two major miners or pools go offline, we have a 51% situation.
This will be mitigated by other miners and pools entering the scene, but AM can not increase its rate. AM can only increase costs. There is no way AM can make more money than they already are. Profitability can only go down. I'm not sure how many more ways I can say that.
Hardware sales is a temporary and minor boost at the moment. If you think otherwise, I have a bunch of Pentium IIIs chips you can buy for $1K each.
.b