A message like this usually appears if you have been reported on Facebook for spamming, which has nothing to do with the website itself, but potentially to do with how you have been sharing it on Facebook
You should see a popup in the bottom left-hand corner that says: "We removed this post because it looks like spam to us. If you did post this and don't believe that it's spam, you can let us know."
If you click on that link, you can go through a process with Facebook to let them know that the post isn't spam and Facebook will review it against their community guidelines - https://www.facebook.com/communitystandards#fraud-and-spam
If you don't see the popup you should be able to go directly to Facebook's Support Inbox https://www.facebook.com/support and see the activity there.
You can click on the link next to the post that says "This Isn't Spam" to start the process.
A message also appears in your Facebook notifications, which might be easier to find.
If you have any further questions, please do get in touch via the Support tab on your PromoteMyPlace account.