Actually, refurbs often do qualify for promos. But you have to read the promo. I got a refurbed Mac Mini in Oct (the early 2006 1.66 Superdrive model) for $649, and a Canon printer PIXMA MP530 $199, and used the perfect companion printer promo to get a $100 rebate on the printer. Not a bad deal. Now I called in advance to verify that the refurb qualified. As far as the FCE $99 promo that ends next week, not sure if refurbs qualify, but I would expect that they do.
Also, I think that refurbs are great because they were faulty for some reason or another, DOA or whatever, and so have been through an extra level of Q.C., meaning you are less likely to have an issue down the line, whereas there is little to no Q.C. with refreshed other than wiping the drive.