Ending a contract with an agency that runs concentration camps is good. Better, though, is to not accept any contracts with any government that runs concentration camps.
Small steps are good. Big steps are better.
PS: great fear from all paying customers that run concentration camps that an internet mob could separate them from their code at any time -- sounds like a good policy to me. Not as good as "Don't be evil", but reasonably close.
If ending contract with an agency that runs concentration camp has any meaningful impact on said agency, the only thing you achieve is making their service a bit worse and life of people in their custody a bit miserable.
That's the opposite of good, you're just hurting people you supposedly care about.
No, I don't think that works.
But hey, if you optimise for immediate feeling of righteousness and moments of back-patting, there is no reason to overcomplicate things.