There are other benefits as well. Youtube promotes trending videos, so if you get a lot of views very quickly, particularly among a common demographic, then th

There are other benefits as well. Youtube promotes trending videos, so if you get a lot of views very quickly, particularly among a common demographic, then the video will be more heavily promoted, and is more likely to go viral. Similarly, videos with lots of view tend to appear higher in search results. I imagine that people at youtube are very aware of this, and put an effort into distinguishing ``real'' view (consistent demographic/trusted referer) and ``fake'' (spammy/ black hat SEO) views.