One thing that confuses me: when does multilevel marketing become something to avoid? For instance, we recently had contact with whitedotbox.com who have partnered with Yahoo! to offer a pay-per-click search box that can drive revenue for charity and third-sector organisations. This seems all well and good, but it's highly tiered and has affiliate/referal incentives built in. What is the line between a "pyramid scheme" (so to speak) to be avoided, and a method to build in growth?
Might just be being very naive so feel free to kick me into gear ;)