Not "He makes good products?" but "He generates good products"? It accepted "makes" just fine for "He makes good cheese" and other similar sentences.
I hope Duo fixes this sort of stuff before adding more languages
I agree. I've also used "makes" instead of "produces" and it has been correct with other phrases, not to mention it sounds better. I'll send this in as an answer that should be accepted.
I didn't dare, as I didn't want to lose a heart, but it is very clumsy as it is