This isn't about good/bad or something like that, just an odd presentation that doesn't seem to be in line with the license. There is nobody to pay here to use this stuff because you still won't be able to integrate it without also sharing internal IP.

There are plenty of organisations that would happily pay what they'd normally pay Atlassian to use Wiki.js but they can't because they don't want to share any of their own code. This is also why license guides like the one from google explicitly bans all AGPL software because it's not worth the risk.