Relationship building with your business? Even if your an affiliate do you create relationships with those that buy your products?
It depends on what you mean by a relationship, ideally your relationship will consist of them trusting and respecting you while all you have to do is write posts or even just own a site with good copy. If you are in a face to face business then I'd say relationships must be deeper but online your primary goal is to gain trust in whatever way you can, if that means emailing every person individually everyday then that is what you have to do.
If they are my personal referrals, I would keep the relationship (ofcourse professionally ). If they are coming from Natural traffic, it would be difficult for me to maintain relationship with them
Relationship building? Depends on the context. I would say it is very important but be realistic about how much each person will do for you. Also, be careful of spending too much time networking and not enough time generating revenue.