No one gives CSGOLounge money, and CSGOLounge don’t give any money as prizes.
Sites like CSGOLounge let people bet their skins and items (paintjobs and hats, basically) on matches to win more skins.
These items do have a value within the Steam economy, as users can buy items with real money and sell them in return for Steam credit.
CSGOLounge and Dota2Lounge say they’ve decided to get a license to run esports betting legally, though they’re still insistent that they don’t need one.