I see so it's not possible.That would be the follow function, however I don't think you can create a link that does that.
Got it well I'm just trying to maximize the possibility to get more likes as cheap as possible when I run my own ads.. I know people here offer service to get cheap likes from fb ads campaign but I don't have that money yet to acquire their service.so baically a drive by subscription. Could work, bur not long you will be banned after a certain time, because this method would be against FB's community standards