I wanted to wait to see if there is more evidence about the purchase of the account or something, but it is clear that the account is not operated by whoever created it. Normally it would be bought or hacked, but if there has been no complaint from the original owner I would opt for bought. In any case, mainly because of that and the plagiarism, for me who operates that account is not trustworthy, he does not hesitate to take shortcuts to make money on the forum.
If the account was bought, it is a much smaller mistake compared to the plagiarism he was accused of. Proven plagiarism (which is not that difficult to prove) leads directly to a ban, the way in which the person who currently manages the account came to control it, is completely negligible.
The absence of a complaint by the original owner does not mean that it did not happen. A large number of accounts are neglected or inactive and their owners probably don't even think about them. The only investigation that makes sense here is whether there are alt accounts connected to the person behind ItsCrafty, mostly for the reasons of mistrust you mentioned.