In addition, the mammogram business has become highly lucrative, and younger women are the best customers.
Also, because tennis has become so lucrative, it is attracting better athletes.
He said such sales had become less lucrative because many people had already replaced their collections.
"It reached a point where the baseball business had become lucrative enough for me to take the leap."
With short-term interest rates near zero, economizing has become more lucrative than it was in the 1990's.
For the movie industry, video distribution has become more lucrative than the theater box office.
But for hotels with attached indoor water parks, the combination has become lucrative.
In the 1950s and 1960's fishing trawlers were being built and became more lucrative.
During her last years, her business seems to have became less lucrative.
Over the past decade, illegal child trafficking has become more lucrative than the drug trade.