To everyone publishing app store content, please do not use GPL v3 to publish content.
https://resources.whitesourcesoftware.com/blog-whitesource/top-10-gpl-license-questions-answered
If you have used a GPL component in your software, then your entire software is considered a ‘work based on’ a GPL and, therefore:
This implies if anybody using a widget or module that was published on GPL v3, they Mendix project must be open source and could have the own copy right.
Is this correct?
A quick search amongst recent AppStore apps shows that ApacheV2 is by far the most popular, followed by MIT. Both stating it is open source and copyable as long as you add credentials.
Some wisdom can be acquired reading https://en.wikipedia.org/wiki/GNU_General_Public_License#Copyleft. Indeed it looks like the GPL seems to prohibit using it in within any proprietary software. But would Mendix not have thought of that before they added that option to the dropdown list?
NB. Not a laywer. Hope someone with legal background will respond and give us a definitive answer.