Wont these sites be savvy to a user suddenly getting thousands of likes/views/subscribes etc?
Most of them dont care. Youtube has a pretty good system in place to make sure you wont get payed much for fake views. The pay by seconds watched now (not sure when excactly this was changed), so if you buy 100 people watching 30 seconds you have the same value as 5 persons watching the entire 10 minute video.
Aren't there bots that can just watch the full video?
Hopefully My Buyer Will Post Reviews Soon