CSGOLounge still exists and it still is one of the most popular sites for CSGO fans, even though it doesn't offer skin betting anymore. Nowadays, if you register at CSGOLounge you would be able to trade your CSGO items with other players, but you will not be able to use your skins for betting purposes.

Things to Keep in Mind When Betting on Counter-Strike\n\n Understand the CS2 betting markets before you bet on CS2 matches. Use reputable websites such as: Bet365, Cyber. bet, Betway, LeoVegas, DraftKings, Stake, GG.