My competitor contacted to one of my newer blog sites contacted me and said he wanted me to drop my site and write blogs for him. He is established and has way more traffic than me. (pr3 site) I'm not going to give up my site but I'm trying to figure out ways that will benefit us both. I've already thought about a link exchange, any other ideas? His niche is more broad than mine, my niche is a sub-niche of his, if that makes any sense.