They are not fake.But the accounts they are using to like are only used for liking purpose to get points. They are not using that accounts seriously. Thats why these accounts can't help to get traffic or business. Yes, but in starting it is good to have likes from addmefast so that by showing your weight you can get real likes.
I myself use bots with sites like this, you cannot expect good engagement from fans because they are not targeted, they only liked your page for the points earned. But having an initial boost to your fan base is necessary to create an snow ball effect, many people have what is called "herd mentality".
Dude these sites like addmefast, liker etc these sites can never help you in anyway, All those likes which you get from these sites are 99.9 percent fake. and the most important thing is people used to use several scripts for these sites to increase likes.
That's what I thought too in the 1st place. Thanks for clarifying that and taking that to the public 9th step.