which yt likes/views free services actually WORK?

hey
i tried many free likes/vies exchange services like vagex/u2bvies etc
the only one that seems working normaly for me is enhanceviews

so plz tell me guys which are actually working properly?
where can i get likes/comments/views?

Here is a list
blackhatworld.kom/blackhat-seo/social-networking-sites/473608-top-social-exchange-sites-list-addmefast-alternatives.html