I have my pet issues with GM but lets be objective here:

gm is a business entity. Not a social enterprise or charity. Despite the outspoken support for btc, it is still a business and her goal is to profit.

It needs to pay marketing costs, hire engineers, customer service, operation analysts, legal consultants and more. It has to pay taxes, maintain office space, servers, security systems. The staff deserves corporate benefit and bonuses too, similar to you and me in our day time job.

After dabbling in bitcoins for a few months and had experience in other sites and talked to miners, many of us would notice gm's payouts per 1 th/s do not make economical sense. This is a fact

But what is the advantage of engaging gm's service: It is the most reputable and open organisation in the busines, u dont have to be concerned with setup of miners, endure the noise, and troubleshooting. Time saved is money saved.