Is there a real plus side to the new "Send to Kindle" button?

Just curious about potential pluses and minuses you guys could see with the use of something like this... I don't have a lot of kindle readers currently (at least from what google analytics tells me about tablet users) so not sure if this is worth integrating into my wordpress blog.

What makes me very uncomfortable is that it encourages passive downloading of content which I have no access to metrics for. (At least with Wattpad I have some idea of readers/followers or read counts.

Also, I lose out on page views with live ads, don't I? Wondering about this as well...