I think many subscribe out of habit, i sure as hell cant figure out why anyone else would have much interest in my channel, my dashcam uploads are pretty much as far from the Russian videos as you can get.
I don't use subscribe functions on any site, in here are also one of less than a hand full of sites where i would use the like button.
I have picked up one hater on youtube that thumbs down just about anything i upload, even if it was just a pan over a field of flowers,,,,,,,,, pretty funny people can be so sick with anger they do such things.
Seem like the douche bag feel i am so wrong outing dangerous drivers, at least judging by the comments of some people that bother commenting.