WordNet sense 1 (providing profit):

profit-making

WordNet sense 2 (providing personal satisfaction):

rewarding

WordNet sense 3 (producing a sizeable profit):

lucrative, remunerative

WordNet sense 4 (yielding a fair profit):

gainful, paying

WordNet sense 5 (lucrative):

fat

WordNet sense 6 (productive of profit):

fruitful

WordNet sense 7 (producing or capable of producing (especially abundantly)):

productive

WordNet sense 8 (giving an advantage):

advantageous