I came across this event where unrated players are also counted as rated players. Below you can see that every player has a rating of 1824 but when you view the tournament there are a lot of unrated players and they have been counted as rated opponents for the person in 1st image.
In the below image can clearly see that there are a lot of unrated players (ones with rating performance and no rating changes). This is the list of all players played the tournament. can be accessed from here
An interestingly why all those players have a unique rating. Is this some tournament format that is governed by FIDE rules.