An important component that seems many people miss, is that both open source and free software licenses include a business model[1] in the definition: other people are free to sell services for the licensed software.
Some people claim _I can download the software and use it for free, so it is ok that Amazon should not make money out of it and allow ElasticSearch to have a cloud monopoly_.
This sounds like Tesla selling you a car that you are allowed to service yourself, but you cannot have a professional service it for you except for Tesla.
I don't have a strong opinion towards the practice (I'm also working for a company that does closed source after all), but I do believe it is important to show respect to the freedoms that both free software and open source try to protect.