I could be wrong, but it is my impression that we've been told "these are the rules going forward and they will be enforced, however they are not being enforced retroactively", which means that violations of the rules, and problems that predate the new rules going into place will not be investigated or handled. It's well known that the rep system has been heavily abused in the past and that they've stated they're aware of it and do not have the manpower to dedicate to doing anything about that any time soon.
So I would not expect any modifications to people's rep score based on past events to be happening going forward, and I can't imagine how they could trivially automate undoing past gaming of the rep system, nor can I imagine them paying an engineer days/weeks of salary to sort out such a trivial matter in the grand scheme of GOG's overall business operation and finite limited resources.
Yeah, it sucks that some people have had their rep artificially interfered with but going forward everyone should pretty much straight out ignore the rep score value entirely and treat it as a thing of minor legacy importance that has and will have minor side effects for some people going forward until GOG has the resources to commit to improving this aspect of the site which is most likely not going to be any time remotely soon.
So what does it all mean? It means put the past behind us all, and honour and respect the new rules and if there are new problems that arise which cause some people problems to bring it up privately with our community manager in a friendly manner and see what if anything they're able to do about it. They may be able to handle some things right away, and other things may have to wait for the future even if it is inconvenient. The more people affected by a given issue, likely the sooner it will get looked at later, but with emphasis on later.
But of course, I could be wrong too... :)
Thanks for writing this! It's pretty much exactly to the point, and I'd like to once again highlight the fact that I will not be looking into any past offences, nor will I ban people based on past offences, nor will I investigate past rep abuse. However, if anyone has a suspicion that they're rep is being serially & systematically decreased by other forum users, please do let me know.