Hello, when a link gets blocked by facebook what need to be changed in order to have it unblocked. As far as I read in other threads, it is not enough to change the URL of the Link, it will be still blocked. Some people said it is enough to change preview image, title and description, but other say that the fb crawler is following the redirects and compares the content of the website. What is true? If the second example is true, what needs to be done, to have it not blocked?