I decided to copy the rules from the front page and post them here, just in case someone doesn't pay attention to it.

Rules:

• -Don't post anything pornographic in the group. You will be banned.
• -If you have a story that isn't safe for work, then you MUST put it in the NSFW story folder (please keep NSFW stories in this folder and only this folder).
• -This group is exclusive to monster mares (female ponies that have monster characteristics) so don't add stories that don't apply to this. Sadly this includes Equestria Girls with Monster Girl qualities, since they aren't ponies, they don't count. You will need to put them in the Equestria Girl Library.
• -Monster Mare stories with the Anthro Tag are to be placed in the correct folder in the Underground Anthro Archive.
• -Stories involving female changelings aren't allowed (at least not if they are the "monster mare" of the story), merely because there are already plenty of group dedicated to changelings (along with their queen) and if we were to allow them, they would overpower all the other monster mares in this group. Sorry Ocellus lovers.
• -Put your story in the folder that best suits your story (the different categories are within the Library For Monstrous Mares). In other words please put your story in only 1 folder, otherwise it looks like we have more stories than we actually have.
• -Story Updates are allowed in our forums, so long as the story pertains to monster mares. Please reuse your original thread when providing updates on your story. Only bump your story threads if it receives a significant update (like a new chapter).
• -Feel free to post questions and ideas in regards to monster mares in the forums section. We will enjoy talking about them (just remember to keep it SFW).
• -Be respectful of your fellow members.
• -Have a good time.

And there... we... go!