Wish/AliExpress/DHGate/DealExtreme/Taobao/etc. they're all just marketplaces to get shit direct from China. They're not a scam per se, like you won't get your CC info stolen. However the products on these sites are barely moderated. You have to use some logic (does it seem too good to be true?) and only trusted sellers.....Although if you want decent counterfeit items(mainly clothes) or cheap chachkies, then they're pretty good sites.