Content Locking - Share to Unlock?

I have an ad-free movie website and I'm considering using cloudflood with it.
It's basically a free content locker where you have to share the website via social media in order to unlock the content.
Does anyone know of a website similar but better than this?

Edit: I just found out that cloudflood actually isn't a content locker. But the question still stands, as if it was one.