Why does per-child fairness matter?
When siblings share one screen-time allowance, the day turns into a scoreboard. One kid does the chores and the other spends the reward, or the fastest gamer drains the pool before anyone else gets a turn. Earnest avoids that by tying earnings to the individual child. Your seven-year-old and your twelve-year-old can live under the same rules while working toward completely different quests and rewards, each seeing only what is theirs.
