I have experience with in-person presentations, direct mail, trade shows, handing out biz cards, network at events, etc. Can offline marketing be as effective for my SFI business as online marketing?
Sure, offline marketing can help.
To be honest, you have adventage comparing with new affiliates who need to learn what marketing is, no matter if it's online or offline.
Also, you can use your skills to make campaign or meetings to present SFI and then just distribute them your link to register for free,
or even better gift certificate and to use that in TripleClicks!
Good luck!