do you get some traffic from other peoples links ( link exchange), if yes whats the percentage or do you exchange links for just SEO purposes
It depends on the site of course. My HT site exchanged liknks with a very high traffic HT site that does equipment reviews and they featured my site on their home page for a while and I got a lot of hits from their site. It helped my traffic considerably for awhile until my story got bumped from the front page and I still get a visitor or two a day from them.
For one of my sites, this one link actually gives me 75% of my traffic. The link is the first one in the site's link page. Without the link, my revenue from adsense would probably be pitiful. This is one-hit wonder though, as most links give me very little traffic.
It depends on how much traffic the site is getting where your link is placed & how relevant is your link to the content of that website. I do get a little traffic from link trades.
I tend not get to much traffic from links on other sites. For me links in forum signatures and some directories bring more traffic