Anyway, whatever problem the local board has let it solve by them at their level and no need to reach out the forum admins as much as possible. There are local boards moderators and for sure those users should be PM first and should have respected the chain. It is not a good idea to directly go over admins or global forum moderators without asking first the local boards moderators. This is how it should be done and posting here would less likely to be appreciated by theymos.
The information that served as the beginning of my investigation was published on february 04, 2019. Everyone in local ignored this information. There was no action or comment.
When additional evidence was published (on June 08, 2019), some DT members (taikuri13, chimk, Alex_Sr) began to aggressively protect the scamer.
And as you can see from the first post, I found a lot of scamers and additional evidence, but none of the listed DT members are interested in it, they only continue to protect the scamer.
I think this is an important issue for the entire forum and should be resolved at a high level.