The phrase "a profitable avenue" is correct and usable in written English.
You can use it when discussing a method or approach that is expected to yield financial benefits or success.
Example: "Investing in renewable energy has proven to be a profitable avenue for many companies in recent years."
Alternatives: "a lucrative path" or "a beneficial route."
Downing should have scored his first goal for the Reds against Wolves but shot too close to Wayne Hennessey but already Dalglish has seen a profitable avenue of attack open up for his side.
Although the internet has helped turn muscle worship into a profitable avenue for former pros like Cornick, the allure of a woman with bulging biceps dates back well before the internet days.
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My bet is that once Apple has Windows Vista running smoothly on its operating system and helping its business sales, the company will try a more profitable avenue: marketing a version of OS X able to run on regular PC's that now use Windows.
The study of how the brain integrates a history of evidence into a single expectation has been a remarkably profitable avenue of research in forming quantitative understandings of neural mechanisms over recent years and decades.
By maintaining consistent, positive and receptive contact, and offering opportunities that are mutually beneficial, you can enjoy a promising and profitable avenue for personal and professional opportunities.
The right wing remained QPR's most profitable avenue and it was from there that they carved out what proved to be the winning goal.
For the time being, low-resolution map technology (e.g., optical restriction maps) for very long immobile molecules points to the most profitable avenue.
Such determination would influence and shift our focus to (among other profitable avenues of inquiry) the ways in which a first-rate novel's form reflects its intentions.
High inequality and forced savings during WWI created a large pool of loanable funds that did not find profitable avenues in agriculture, and the newly emerging industrial sector was insufficient to exploit the excess savings.
He shuns any stocks that require "leverage" to make profits, such as banks and property companies, and sums up the perfect investment as a company that is generating lots of cash and is still able to find profitable avenues to invest it.
