You seem to be confused about copyright laws. I never said to claim something from Plesk and say it was written by me or anyone else. WPB allows exactly this feature and last time I checked it was made by the same company. So I basically asked for the same features but with Plesk.
I never said a company would claim its coded by them. It's for consistency with support and talking with customers, making documentation, marketing material and brand/product consistency. We have our own trademark for some products, so why would be invest a huge amount of money promoting Plesk or cPanel? Not serious company would approve a budget for another company.
Copying the documentation would be indeed copyright infringement and that is exactly why I asked about changing the url to let customers point to their own documentation instead of using Plesk's site. You basically just confirmed that users should not be using Plesk documentation in the first place because, well it belongs to Plesk.
A documentation that is written by us, with our video tutorials and without products and services. It would hardly even resemble Plesk because Plesk is only one small part of the equation when providing services. It doesn't include a lot of things like domain registration, IP management, cloud instances, etc., that would be integrated.
I'm also a bit surprised by your response when Plesk is not a free software. People are licensing Plesk and last time I checked you are targeting it as well to service providers, so I don't see what the problem with completely removing the Plesk references.
cPanel has no issue with this and Godaddy has done exactly that in the past. Their cPanel was so customized that you didn't even know it was cPanel unless you already know the software. And I and others asked cPanel before about how to remove their logo and other things, and they give clear directions without issues because they don't care. (that is what white label and branding is). Same with WHMCS. Removing the copyright internally is one thing and not what I was asking. Removing references to where customers interact with products and services is a completely different story.
Someone that knows Plesk or cPanel is not even the purpose of branding. They will always recognize Plesk, or cPanel or whatever software a provider is using. And actually, that is precisely a selling point. When customers ask's what you are using as the provider, you tell them Plesk, and then they want Plesk because they see how incredibly powerful it is when it comes to branding and customization. Even if a customer never changes anything, people want to see a vision of what you can do or go with a platform, assuming you consider Plesk a platform and not just a software like Office or Windows.
Let put WHMCS as an example, do you really think anyone would buy WHMCS if you were not allowed to rebrand it completely? Of course not. Even Plesk here promotes WHMCS integration and last time I checked, every single company that uses WHMCS or Blesta for billing, you will not find one single reference to the software. Blesta even promotes their code is open for changes. That is what companies want today. This has nothing to do with copyright infringement; they allow this and nobody would use the software otherwise if they can't change it to fit their brand/company.
The service provider edition should allow full rebranding, why not? It's not like this is free, a company would be licensing every single server so why would Plesk care about this? They are still profiting and receiving money, and anyone with even a small clue will know its Plesk anyway, you can't hide anything on the Internet, and someone asking somewhere would get a direct reply. The only purpose of this is branding something together with a product, for example, if someone decides to sell just email services with Plesk and call their product "Business Email" maybe they want Plesk to be completely branded as "Business Email".
It's not your customer's job to do marketing for Plesk. That is Plesk's job as a company. Plesk customers end users are their customers, at least talking here about the Hosting/Service Provider edition. If you buy Plesk for your own use or sites, that is a different model.
If you consider this is somehow strange (what I asked), Presence Builder got it completely right. They even have full documents on how to rebrand/customize everything you want here:
Rebranding Presence Builder
Yes, that also includes the name and help links everywhere, colors, even topics...
Did I mention they even allow to remove the copyright footer? And no, this has nothing to do with infringement. You are not selling the software to others as developed by your company and you are not internally removing any copyright references or code either. Here, take a look:
Changing the Product and Company Logos, Hyperlinks, and Copyright Notice