Yes, I have actually. It's quite exciting, but also risky. HypeDrop Games https://gamble-csgo.com/hypedrop-promo-code/ offers a wide variety of mystery boxes for different products, such as sneakers, tech gadgets, and even luxury watches. But the ones for CS:GO skins are definitely the most popular. I've heard of people winning really rare skins worth hundreds of dollars, but also losing a lot of money in the process. If you're interested, I can recommend some good CS:GO gambling sites where you can also open cases and potentially win some nice skins.