Void of profit, gain, or advantage.

adjective. Without profit; unprofitable.

adjective. not yielding profit

adjective. without profit or reward

"But profits evaporated, creating an era of so-called profitless prosperity in the middle of the decade when auto makers sold record numbers of vehicles in the U.S. market - as many as 17-million annually - and lost tens of billions of dollars."

unprofitable  

unrewarding  

aimless  baseless  engrossing  fruitless  insipid  

gainless  unprofitable  useless