I’ve bought some stuff off there and can tease out some aspects, though they may be after the fact rationalizations of subconscious effects.
The first is price. The stuff is cheap, as in so cheap I know it will be terrible and I still sort of don’t care. It’s $2, if I only use it twice I got my moneys worth.
That makes it super easy to hit Buy without thinking much.
The second is that they appear to target verticals that don’t have a natural ceiling to sales. I only need one microwave, so they won’t sell me that. They do sell a lot of apparel, decorations, toys for adults (crappy 3D displays, not dildos), stuff where you don’t think “eh, I already have one though”.
The third is the marriage of entertainment and shopping. I can be doomscrolling, see an ad and buy it without ever leaving the platform. If I remember right, it doesn’t even interrupt your doomscrolling really. Swipe to next video, see it’s an ad, hit buy, confirm Apple Pay pop up, scroll to next video. You can decide you want something, buy it, and be on your next video in 15 seconds. It’s so fast it almost blurs the line where I’m not sure if I’d call it shopping or entertainment.
The last is that they’re really good at luring consumers to start selling on there. The ads for stuff tend to be sort of home made and low quality, which makes it seem attainable for your average person. That tends to mean a huge selection. I had a buddy that randomly decided to sell stickers on there just based on watching other people do it (no idea how that went, I didn’t ask)