[hellcow]

This is interesting because it’s also one of SQLite’s monetizations. SQLite is in the public domain, but you need a commercial license to access their TH3 test harness with 100% branch coverage used to validate SQLite on different platforms.

[OptionOfT]

> We’ve sold exactly zero copies of that so that didn’t really work out.

Source: https://corecursive.com/066-sqlite-with-richard-hipp/

HN Discussion: https://news.ycombinator.com/item?id=27718701

[kilroy123]

This has always struck me as such a strange monetization strategy. Do they actually make money off this?

[lieks]

It works as a fork deterrent; forks can't easily prove they are still correct without the test suite, so if a company needs to tweak SQLite for any reason, they are better off paying for the tests so they know their tweaks won't break anything.