Bob Vila

I stumbled into this place a few days ago and Ive been trying to figure out what its all about. Ive been to the cjbucks site and i have a few questions.

Must i have my own website not related to this place or sites? Also how does the site know when someone joins becasue of me so i get the credit? A nice brief basic summary of how this works would be great, and also i was wondering about the "different" programs i see people talking about. Are they all parts of cjbucks,or is cjbucks one of many different placs that you can work with?