You keep their money. It's always good business to know about new customers before they walk in the door. The justification for profit is profit. New customers are like razortoothed grubworms. They can be succulent, but sometimes they can bite back.
Employees are rungs on the ladder of success.
Don't hesitate to step on them. Never begin a negotiation on an empty stomach. Always know what you're buying. Beware the man who doesn't make time for oo-mox FRA229. Latinum lasts longer than lust.