Well I think this post is evidence that there are people who are concerned about the ability to use OwnCloud in a business context.. so that's something I guess.
Also, why should anyone want to use a crap license that restricts what you can do. As a software engineer those are crap licenses, same as a business owner, why do I want to support creation of some software that will never be a true native cloud service, I'd rather those companies and tech stacks die. The only people who care are startups who can't figure out a business model, and you should not sign up for that kind of craziness.
The AGPL only limits developers, not users. Users can do essentially anything they want with the software package they receive, so using AGPL software is no different for them than say MIT.
Why would an end user, which a company self-hosting something for their own use is, care about the license that applies to developers? And if their reason is that they might want modify the software to work better for them, 1) why would they not want to contribute that back and 2) I have some scary news for them about any other non-FOSS software they use (surely a lot).