I removed the option after it stopped working on Amazon's end. Then I noticed that Amazon was quietly doing away with the notion of Add-on items altogether. Are you still seeing a lot of add-on items when you browse the main Amazon site? It's been a while since I've seen one. If yes, could you post a link to a sample add-on listing? Just curious.
Oh, that makes sense. Yes still seeing lots of add-on items. If you search "add on item" their search function sorta finds them, but definitely mixes many that are not add-on. https://www.amazon.co.uk/gp/product/B004345SP6/ref=ox_sc_act_title_6?smid=A3P5ROKL5A1OLE&psc=1 I shop in the UK and checked the USA one. It doesn't say add-on anymore to the items, even if I search for "add-on" but weirdly it dose show items in typical add-on prices.
Ahhh... sorry. It was pretty shortsighted of me to assume that if the US site did away with it, same happened with other countries. OK, I brought the toggle back for non-US sites. Check it out (do a full page refresh -- Ctrl-F5 on PC browsers),
Fantastic, thank you very much!