Thats where the "sour grapes" come from. When another person takes a valuable thing that someone else made and turns it into monetary gain they feel like that is "stealing."

It is less obvious because its not as directly and easily measurable when a direct dollar sign is put on a product. The same feeling happens when big tech builds huge profit machines using something a person made and gave away as a cog without contributing back. Or when AWS takes something like Elasticsearch and hosts it for profit - Elastic co. sure thought they were stealing.

You call it sour grapes and then describe how someone is stealing something of value. Was Elastic's response to AWS also sour grapes?