I haven't participated in any affiliate programs, but would definitely be open to the idea. Signature campaigns can be very very lucrative, but often they will provide a limited return. I do like the signature campaigns though, as I am happy with any return, especially as I would be on the forum anyway, so it really doesn't 'cost' me anything, not even time. They also provide an opportunity for me to get involved in projects that I would otherwise not be able to afford. Saying that, the returns have diminished over the last 8 months, basically since the market took a downturn.