The business has proved to be highly 'lucrative'.
a 'lucrative' career/contract
a 'lucrative' job/investment
(..) Everybody sober? Close enough. Before we start, nobody's on the line yet. What I'm about to propose is highly lucrative and highly dangerous. If that's not your brand of vodka... ...eat as much as you like and have a safe journey. No hard feelings. Otherwise, come with me. (..)2001 Ocean's Eleven