That response is quite…hostile?

Someone spent their time to report a bug they found but close it because they didn’t pay the dev? Isn’t that a kind of contribution?

It is totally acceptable to ignore it but closing the issue with hostility is a questionable practice.

I’ve been checking that repo for many years. The guy is pretty chill, but several companies have taken advantage. They use the stack, post massive integration issues and demand free labor. Building a commercial product on top of a free open source software is pretty awful practice tbh

Everything is built on top of free open source software.

Oh boy the face once he realizes that Linux is foss and who uses it.

Well most big distros offer tech support for companies, if they pay for their time, right?

You said:

Building a commercial product on top of a free open source software is pretty awful practice

But as @Deleted said, a lot of stuff you use daily is based in some form on FOSS. Linux was just one big example.

I agree that building a commercial product on top of FOSS without giving back in some form is pretty awful practice. But the bold part is important. Simply taking something that’s free and open source and using it for your commercial product is not bad, it’s more common than you might think. But if you do that, you should give something in return.