1 coin per pack: common 50.8%; uncommon 25.4%; rare 12.7%; epic 6.4%; legendary 3.1%; ghost 1.6%

KEIKI earning will vary depending on the total number of coins registered.
Initially:
COMMON: 0.60 KEIKI per day
UNCOMMON: 1.35 KEIKI per day
RARE: 2.88 KEIKI per day
EPIC: 6.00 KEIKI per day
LEGENDARY: 12.48 KEIKI per day
GHOST: 26.64 KEIKI per day

Founders' Coin usefulness:
• Collector's Item
• Stake them to earn daily KEIKI (https://faucet.orchidhunter.xyz/)
• Stake them in Wombat Dungeon Master (https://dungeon.wombat.app/)

Additional use cases will be announced as each phase of the game is developed.