I look at it this way. Why not? I certainly am not here to make money from Ad Sense however since most of my writings are poetry and short stories and not about products I don't ever expect to see much revenue coming my way:0)
If I did want to make more money from Ad Sense I guess I could sign up with another name and avatar and only WRITE about products, then possibly down the road I would see some decent income.
But I am satisfied with my status in life and my resources, also I have another website where I capitalize on revenue. Here is an interesting slant from a respected hubber. She certainly got my attention with this great hub of hers, have a read and leave a comment, tell her the Saddlerider sent you by for a read. It is a fun story.