Thank you for the link.

While I would have preferred if the seller at least referred to the gnucash project in a way, he is in no way required to do so.

The GPL explicitly allows commercial use of the sources. The only requirement the seller has is to provide the full source code upon request to users of his binary packages. As long as he properly does so he’s not violating the GPL. And only his customers can test that.

The gnucash project is also not against commercial initiatives involving our software in general.

We only hope that the seller does a decent job in satisfying his customers. It would be a pity if such an isolated initiative would hurt the gnucash project itself due to misleading activities. So far there is no evidence of such activity.