If all people would immediately reward them with a positive review after backpedaling, then their learned lesson would be “just try it out, worst case we can backpedal”. By leaving up a negative review, they might realize that they should not even try it if they want to keep the goodwill.

They are always going to have this mindset, companies will never "learn it", they will always try to push anti-consumer bullshit onto consumers if they think it benefits them and if they think they can get away with it.

They don't care about goodwill, they care about numbers. It's a business.

I will leave my negative review standing, although I also have other points of criticism.

And that's perfectly fine, people can leave whatever review they want to leave. But I think for the people who specifically changed their review or left a negative review specifically to protest this specific issue, it makes sense that they change it back to an actual review of the game to signal that their actions have an impact.