the case with websites like Temu is that they let people who have entire warehouses of certain crap laying in boxes sell them off for cheap
calling it a scam is like calling the local flea market a scam, it's not, it's a platform, but scammers COULD be using it- most of them aren't tho, most of them are just some joe jin-poe in china who has a whole shelf of nothing but, say, 'silver' plastic earrings, so they'll go online, find a picture of earrings that vaguely look like what they're selling, and slap it on their listing
you're never getting the actual item in the picture because the picture is hardly theirs, they didn't set out to sell these earrings in particular, it's just an afterthought because they have a ton of em
if you know that that's how it works, you won't get scammed, since you'll only buy stuff that you could reasonably find at the dollar store in chinatown anyway- simple kitchen utensils, basic wires, pens and pencils, crap like that... you're bound to get scammed once you start lookin at something more complex, like if you think you're getting an actual xbox off of there, that's when you're asking to be ripped off