Ive been reading all the threads and info on the net Ive could find, but still not really sure how it really goes. Lets say I have 1 main domain + 2 addon domains on same hosting provider. All 3 sites are about the same niche but I have created unique content and unique design for each of those sites/domains. Is it ok to link between all of them? How about between 2 addon sites and then also to main domain, but not from main to addons? Any info appriciated.