The reason Sy Fy is dispensing with new shows is quite simply, the revenue is not there. Sci-fi has always been expensive. Ghost Hunters and wrestling are cheap to produce, and still sell ads. Television, as we know it, is already an outdated medium, making future revenue models uncertain. Worse, current economic conditions make selling ads difficult. Like any company, Sy Fy has to invest in whatever produces the most revenue, even if it is an excavating company in Asia. Still, a company must produce the product that it was created for. This is because a company relies on more than tangible assests. One cannot readily put a price on program library and any number of potential customers, willing to watch advertising. These are things that noone else has and can be made to make money.
Even under better conditions, a specialty TV network has only so many resources to devote to producing programming. It is not even that STU is failing to make a profit. As the company invests its resources in one program, other potential programs cannot be produced. As Sy Fy looked into the future of STU, all they could see was a shrinking audience and less revenue. The future on the company requires programing that maintains and builds an audience. STU did not do that. In fact, it was so depressing that it repelled many veiwers. Sy Fy just has to cut their losses and do something else.