PlantUML Updates to “CoronaVirus License”

This is silly.

Reading through the complete licensing terms... even to this non-lawyer, the author(s) don't seem to understand licensing.

So there's the CoronaVirus License, thingy....

A little further down the page... "PlantUML is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. "

OK... so that's contradictory.... there's no "or" in picking a license and terms of one license are, in principal and spirit, antagonistic to the terms of the other.

And then there's a very confusing bit about image ownership...

That wipes this UML tool off my candidate tools list.

I do believe that the author's heart is in the right place here, but I wonder what this is going to do to corporate adoption of PlantUML.

As an individual user, I have no issue with the license.

As a consultant, I am making sure my clients are aware of this very strange update.

I would urge the author to please consider offering a plain OSI-approved license, at the risk of losing considerable adoption.

UPDATE: The PlantUML team responded to my question, and says this is a very temporary license change.

https://forum.plantuml.net/11018/will-you-reconsider-the-cor...

Chalk it up to over reaction without sufficient consideration