Amazon fashion - sponsored products ppc on jewellery


I was ploughing through Qs here re sponsored products & found post with copy of category eligibility criteria for sponsored product ads that DOES NOT include jewellery. Hang on - I thought - I’ve seen top of page SP ads for jewellery, are they deliberately listing in diff category to workaround. Turns out they’re all listed on Amazon Fashion where you can obv advertise but still appear on standard product listings. Anyone any idea how that works!?