@rooeytoo when you copy the URL, go to the tab on your facebook page that says “profile” first. That will give you the link to your page, rather than a generic one that will take us to our own. :)
@Seaofclouds makes a good point. If you wish to have messages from people that are sending a request, you have make sure that non-friends can send messages.
I just sent requests to the first two people and both I was able to add a message to the request. The third (@Facade), it wasn’t an option (and neither was sending a message). So maybe the option doesn’t show up on friend requests when the person only accepts messages from friends.