I keep getting E-mail from this company www.buildingtrades.com , has anyone ever heard of them or done any work for them. Exactly what are they good for, what do they do for your company? I know what they post on their website but I'm looking for someone who has real life experience with them. How do they pay? What kind of work do they contract for? and so on. Again, I know what they say so I'm looking for real life answers as to whether there worth anything or not.