Ask HN: Conditionally open sourcing a startup?

Have there been startups that did milestone-based open source pledges? Such as:

- Product will be open-source after achieving N active users - Product will be open-source after achieving N in revenue

I think this could help startups in competitive/commoditized markets, who want to open-source but are too small to enforce their license on bad actors with complete ripoffs which I read about on HN before. I'm thinking of GPL, AGPL, but also other more restrictive licenses like BSL. It incentivizes community to help the startup grow.

(I believe I have seen "after 36 months" type of pledges before, though can't remember where.)