A user registered on Bitcointalk just to write a post in his thread to highlight how smooth deal he or she had with FmaTR. Definitely, this is absurd and we can confidently say that this user creates fake accounts to write positive reviews about his service.
You are absolutely right here. This is already a well-known technique for improving all offers through feedback via an alt account. I really don't believe that anyone believes in what he does.
He has been doing this since 2022, idk if that got unnoticed or if that is okay on this forum but one thing is for sure, this user is a scammer and liar.
You cannot be sure that he is a scammer if there are still no proven charges against him. He probably went unnoticed because his service is not interesting to anyone here.
What you can do is present all his fake and alt profiles here, maybe create a flag for his main account and ask for support from DT members.