We all know that Ethereum is a free open software but the problem is that license of sources used in Ethereum might not be open for commercial.

https://www.coindesk.com/coders-beware-licensing-issues-abound-ethereum-apps/
This is what I read,
and I have some questions to Bitcointalk people.


1. If one uses souces of Ethereum for commercial use, is it against law? any penalty?

2. Wasn't there any issue of this license problem in Ethereum based application(ICO) market yet?

I'm curious since open source license is not something blockchain developers are not aware of yet.