Ethics are a personal construct outside the law. (In some narrow cases, like psychiatry it's enforced, but that's the exception and doesn't apply here.)

In other words ethics are whatever you say they are. And polling the internet for permission will turn up a mix of aye and nay.

Is it -legal-? That's a different question, and "ethical " questions are usually a prelude to breaking some law under the implication that the law is "unjust".

As an aside I presume you are a -customer- of said company? Since GPL rights only applies to those with a legal, binary, copy.