yes thats right, what the known said is right, i have many test videos on my personal accounts that are getting tons of views per day, but its not 100% like SPK mentions, they dont removed ALL the checks, if you use refreshers it will still not work, it seems most likely that they got back the OLD system that had only the ip check and proxy checker, that system was less complicated and had without no doubt less checks to see if the views are legit, in other news u2bviews did got yes many improvements including the new firefox addon wich will also soon support likes, favorites, and subscribers (question of DAYS).
Update: yes it seems that they "patched" it again back, i still getting views per day but its not like 200 per day like it was days ago, its more like 50 to 100 max now (it seems that their system is also affecting "legit" top youtuber videos).