This seems similar to the Notepad++ team using their platform to promote political viewpoints.
The same thing happened with Facebook "pages", when they became a personal "soap box" by the owner of the page. It was downhill from there... You might as well turn the whole web into FB/Twitter/X/Insta promotional spam at that point.
It's not at all similar, and that doesn't have anything to do with the quality or lack thereof of the viewpoints.
The Notepad++ site is run by the authors and reflects their stance. Putty.org is run by an outside party who hijacks the reputation of the PuTTY project to push their agenda.
The same thing happened with Facebook "pages", when they became a personal "soap box" by the owner of the page. It was downhill from there... You might as well turn the whole web into FB/Twitter/X/Insta promotional spam at that point.