No, Digital29, I don't think it's hard at all.
Actually, I started doing that many years ago with a Website. A really big website contacted me to ask, if they could publish some of my tips with a link back to my site.
Of course, I said yes, and I got a permission to post their articles on the same condition.
So whenever I ran out of ideas for my five, weekly tips, I would go to this bigger site and find something of interest for my readers.
We were both very happy with this deal, and over time, my website grew a lot. I guess this deal has helped with the process. I'm sure it hasn't harmed it, at least :)