From the Model Mayhem FAQ:

How do I show Praise?
First, you will need to make sure that you have received Praise to begin with! If you don't have Praise from someone, simply send a Request for Praise. Once you have Praise, if it is not showing up on your profile then it is probably hidden. To unhide your Praise, go to My Stuff, then My Credits. Find the Verified Credit you have Praise from, and then click "Show Praise" to unhide the Praise on your profile.
Once it is visible, the link will change to "Hide Praise" - which you can click if you do not want that visible on your profile.