Credits are spent in the in-game /store:
• Gamepasses: 2x Cash (2,000), Lucky (1,500), Mega Shield (1,200), VIP (1,000), Auto Collect (1,000), Speedy (800)
• Lootboxes: Common (40), Rare (100), Epic (250), Legendary (600)
• Global boosters for the whole server: 2x Money (150), 2x Mob Luck (120), 2x Fast Belt (80), each 30 minutes
• Cosmetics: steal effects, buy effects and trails (250 to 1,200)

Credits are added to your account instantly and never expire.