i hear different things being said about sitebuildit, but my decision to invest in it or not is largely based on specifics - how much money one would expect to make with the site in what period of time?
I'll bet my bottom dollar that the majority of people who sign up don't make anything. How much you make and in what period of time depends entirely on how much you put into it, how much you understand of what you're doing - and a bit of luck.