Ah, I’ll be honest, I don’t actually read these emails closely often, but you’re right. Looking now through my inbox archive, I see that Amazon added an “I don’t know the answer” link in their email sometime between April and May of 2019. It looks like initially they had the text somewhat smaller for the “I don’t know the answer” link, but they seem to have increased the text size to match the “Answer/Respond to this question” link sometime between February and March 2020. At any rate, those emails were going out for many years before 2019 without an “I don’t know…” link and I think they could still probably make it clearer to people what they’re actually doing by posting “I don’t know” as an answer.
Ah, I’ll be honest, I don’t actually read these emails closely often, but you’re right. Looking now through my inbox archive, I see that Amazon added an “I don’t know the answer” link in their email sometime between April and May of 2019. It looks like initially they had the text somewhat smaller for the “I don’t know the answer” link, but they seem to have increased the text size to match the “Answer/Respond to this question” link sometime between February and March 2020. At any rate, those emails were going out for many years before 2019 without an “I don’t know…” link and I think they could still probably make it clearer to people what they’re actually doing by posting “I don’t know” as an answer.