No it's not based on a per share basis. bobsag3 does the hosting at the most competitive flat rate out there, which is then deducted from earnings before monthly payouts
So what is the $150 host fee? Per machine? Per month? Per week? Per what?
Per month
So the $150 per month is taken off the TOTAL earnings? Sorry the website is not very clear on this and pardon me for being gun shy, but unless things are spelled out here in bitcoin-land there is too much propensity for dishonesty. Heck even when things are 100% clear there is still BS.