If you use the drop down in the top right corner of the site and select "My Ratings", it will take you to the proper page, but the URL will have the wrong argument. Such as:
http://vgmdb.net/db/ratings.php?do=view&id=10
When it should be:
http://vgmdb.net/db/ratings.php?do=view&userid=10
While for yourself, you will still see your ratings, if you pass this link off to someone else, they will only see their own ratings in the first case, because "id" is the wrong argument and "userid" is the correct argument.