Unfortunately, I can see Digital Agencies and SEO Specialists recommending (and clients of both requesting) a slather of buttons for every conceivable type of Like on the off chance that someone actually clicks one.
I don't mean to point fingers, but I don't think this sort of thing is going to get any better: http://i.imgur.com/VeUr1.png
The veritable array of social buttons that appears on numerous Web sites tends to be one button per social network. The idea is not to try and ensure that people click at least one button, but rather to ensure that they almost always have one that they can click. I don't see how adding all of "Like," "Read," "Want," and "Watched" to one's site would help solve that problem.
I don't mean to point fingers, but I don't think this sort of thing is going to get any better: http://i.imgur.com/VeUr1.png