Need ideas spreading a coupon code

I affiliate for a site, that if a new customer uses my referral code they get $10 off their purchase and I get a 4% commission on all their purchases for a year.

I like this, because I don't have to maintain a site and hosting fees and all that. And for each customer, it's a one time thing and I don't have to follow up with them or handle all that. It's very low maintenance on my part.

So far, I've only gotten a few people, because I left an honest review of the site on a forum I visit and two people used my code. Another person used my code from a banner ad I had placed on that same forum.

But I need to get this code out more. The more people that see it, the more people that are likely to use it.

So, what does you guys think? I thought about getting some people on fiverr to pass out a flyer with the site description and code on it. For just $50 or so, I could have hundreds of flyers spread all over major cities in the US. But I'm not sure that'll be worth it.