<rant> A few weeks ago, I agreed to work with a company, because what they wanted me to do would benefit you, my readers and it helped an important cause. A few weeks later, the same PR rep asked me if I would share a picture they created, on my blog. The difference between the two was that while the first one helped you and a good cause, all that the second one would do is give pageviews from my blog (and Facebook and Twitter) to this site. No benefit to you, or to me.
I would do many things for page views, but I won't do that!