Historical clue formulations

• Big moneymaker — 2022-05-29
• Reliable profit center — 2012-09-13
• Good profit source — 2009-08-08
• Consistent moneymaker — 2004-06-27
• Big moneymaker — 2000-12-02
• Money maker — 2000-01-14
• Dependable source of income — 1996-08-25