While the Sanctuary web series was written and produced by the people behind Stargate (hence Amanda Tapping's original involvement) I'm not certain SyFy had anything to do with it's original web run.
I'm of the impression that they didn't sign on until the series was already getting a positive buzz from the web.
Anybody have any links to whether or not that was the case?
According to an interview with Amanda Tapping, they never had any thoughts about the show ever being on TV. Although, she admits that they didn't really make any money from the initial 8 webisodes due to pirating.
She said they still envision returning to the web at some point with original content, though.