Depends a bit on your definitions, but Google did it with Photos.

Google Maps started charging developers once it was the dominant digital map, the fees killed MapFrappe: http://mapfrappe.com/

In the tech space, or outside?

Trade wars between nations happen all the time because of dumping. Timber, aluminum, soybeans, and all kinds of other commodities.

Tech companies have largely gotten a pass on normal business practices and codes of conduct this century because they're shiny and new. But as the industry ages, it will have to learn to work within the boundaries or ordinary civilization.