I probably have no idea what I'm talking about but it seems to me like Temu advertises on social media platforms & Banggood to YT creators. I don't do social media, I was on IG for a little while years ago, but that's it. I have never seen a Temu ad ever. I watch YT a lot but I don't see ads.
I've only heard of the horror stories about buying from Temu, I have no interest in buying from them. But to be fair Aliexpress had their share of horror stoires way back when too. Banggood I purchased from only one time, while it was a good experience I haven't browsed their site ever since. I don't really like their format.
I do still buy from Aliexpress occasionally. I have never been burned on Aliexpress. I have had only maybe 2-3 issues over the years which is good & was always resolved quickly by the vendor or Aliexpress. Lately my Aliexpress orders have been arriving very fast, like less than a week. I had an order earlier this month arrive in just 4 days! And my orders will get consolidated by the final shipping courier & delivered in one package which I kind of like. I placed another order on the 22nd, last Monday. 3 different vendors, they all arrived in one package today. Not as fast as the last order but 6 days is pretty good & today is Sunday.