I've tried a variety of different specials and promotions over the years... the only method that worked for me in that vein was to offer discounted FBSM sessions. It gave the curious a chance to see my face (since I seldom show it online) and the opportunity to sample the majority of my talents at a lower price point.
Whenever I offered special deals on regular GFE sessions-- it didn't generate enough interest to make it worth the fact that the majority of specials seekers for GFE weren't likely to become regulars-- I've found that a lot of the guys who seek out the specials are also the same guys who are here to get as much variety as they can get. Which-- is fine if that's your style, but I've always preferred to have a group of regular gents. But the FBSM-- yeah, that was a gold mine