I've given away quite a few pedals in the past and to date not a single sale has come of it.
I'm a VERY small-scale company. Each pedal is made to order, it's not like I have stocks lying around. I make VERY little money from each pedal, as my core belief is to keep them as affordable as possible. I understand that most musicians are not making a lot of money, but nor am I. For every pedal I give away, it's actually a pretty big dent in my earnings.
I'm all for mutual advertising, sharing links etc and will happily add you to my website, or allow you to post on my facebook page. There are other ways we can help each other out.