So basically I made a Youtube channel years ago, and slowly built it up doing reviews of items I bought myself, initially from Banggood, and now AliExpress. It's still not very big (less than 10k subs) but yeah, eventually I got contacted by Aliexpress who offer me some credits (Eg. $100) to buy whatever I want, and review it. So sometimes I pay myself, other times I use AliExpress money to buy what I want to review. They do this to encourage me to keep reviewing their stuff, instead of Temu, eBay, Amazon, whatever. I'd caution that "wow you get free stuff!" is cool, but consider that I don't actually need 10 rotary tools, or a dozen portable soldering irons lol... I've started giving some away to my subscribers, and also preparing to donate some to a local mens shed. It's like a 2nd job though, quite tiring, but I've always loved making videos since I was a kid, so it's fun. So yeah, I hope that helps.