Proof: I am checking all of the report in my campaign and I noticed that these users have the same posts and I did a cross-checking and found out that they indeed have the same Tweets it's either they have the same owners or copying another's Tweet which is a form of cheating (Using other contents for your own sake or advantage).
Miscellaneous: I did not give negative feedback to Gegrre54 as there's no reason to give him a negative trust unlike the other two that's copying other people's Tweet for their advantage which is a form of cheating. I will do further investigation and if I find a proof that these accounts are related to each other then I will give Gegrre54 a negative trust too.
Edit: Looks like Greg is also copying this user's work Murshalin95 (I edited/updated the proof 2)