As I cannot edit my prior post, I want to add that I just tried something and the link stayed up on a page I manage. I just removed the 's' from the https. I did not get flagged for spam or anything. So with that said, I think the main culprit could be the group itself that the link is posted in. If there is 100's of posts in there that is linking to RR, I can see where it would flag all links from the main domain so you will probably have to get creative to keep something of a link to help those who have asked. I think it still would be beneficial to reach out to FB on it as it isn't like we are trying to spam this site on FB. We are legitimately trying to help others on another platform but are being shot down in the process.
EDIT: Well I take that back. After leaving the forums, I went back to browse FB and bingo, the popup of the post being removed that it went against their spam policy. Even on my own page! Well guess it is back to drawing board on trying to link something from here.