Sometimes if there's a good deal for something I know I want. For instance, I was wanting an RG35XX (portable retro console). I had never heard about Temu, went there and got the $100 off bundle (basically a set of thresholds to hit for up to $100 off). I found the RG35XX for $53 ($17 less than Amazon), and that coupon knocked it down to $28. For me that was a no brainer.
Precisely. They were a fun thing to give out, and directly helped to pay for server time. I even liked how Reddit would tell you how much server time your awards gave to Reddit (which I think they've removed?).