Before making suggestions like this and getting the HN bandwagon to support this POV, perhaps we should put ourselves in the startup's shoes?
Forcing an open source on acquisition severely limits your exit options and lowers your acquisition value. In terms of the companies you've mentioned with commercial open source models, none of them are clear successes. All still have battles to fight. Open source is a really hard path to take, and it's littered with dead companies and zombies who's revenues have been cannibalized by their open source creations.
As much as the users feel like startup founders owe them something, startup founders are human like everyone else. They don't exist to be our slaves. Imposing rules like this on companies would result in fewer tools and companies overall as the companies themselves would no longer make economic sense.
Forcing an open source on acquisition severely limits your exit options and lowers your acquisition value. In terms of the companies you've mentioned with commercial open source models, none of them are clear successes. All still have battles to fight. Open source is a really hard path to take, and it's littered with dead companies and zombies who's revenues have been cannibalized by their open source creations.
As much as the users feel like startup founders owe them something, startup founders are human like everyone else. They don't exist to be our slaves. Imposing rules like this on companies would result in fewer tools and companies overall as the companies themselves would no longer make economic sense.