There is a legit URL shortener called "Shortest". It provides certain tools which you may use to create URLs that are acceptable to Facebook. It is a famous URL shortener and it offer good CPM rates.
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There is no paid URL shortner that has not been blocked by facebook. if there is one then it is because it is new. Before the blink of an eye, facebook will block it also.Dear friends
Let me know which short linker is best which facebook allow to post on all groups?
Exactly what I was about saying. Shortening of links isn't the issue but the content you're posting. I don't know how their algorithm manages to detect those content. But I think bitly is still one of the best out thereNot everything you can post on facebook. Facebook have restriction on some contents, their are contents or post tag prohibited by facebook. Sometimes you will post and find out that your post is under moderation at Facebook.