Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/1210
Dear @mwpenny and Zeppelin PMC.
I have reviewed the license of ArcGIS Online
https://developers.arcgis.com/terms/ and and
http://www.esri.com/legal/software-license.
Although it's client javascript library is Apache 2, client does not
functioning without ArcGIS online service, so the ArcGIS Online license does
matter. However, the license does not look like type of license we can use. For
example
> Generally, if you are not planning to monetize your app, say by charging
a fee or by embedding revenue generating advertising in your app, you can make
your app available to just about anyone.
and
> If you want to charge for access to apps you build using ArcGIS Online
you have to have a paid subscription.
Apache 2 License allow monetize Apache Zeppelin. However ArcGIS Online
license has incompatible restriction.
Also the client is loading arbitrary code (javascript) dynamically from
their server on runtime and we can not guarantee what kind of code will be
executed on our user's machine.
see
https://github.com/apache/zeppelin/blob/master/zeppelin-web/src/app/notebook/paragraph/paragraph.controller.js#L1392
Therefore, unfortunately, we might need to remove this changes from our
source tree.
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