The phrase "a substantial customer" is correct and usable in written English.
It can be used to refer to a customer who contributes significantly to a business's revenue or sales.
Example: "Our company has secured a contract with a substantial customer, which will greatly enhance our financial stability."
Alternatives: "a major client" or "a significant buyer".
John S. Riccitiello, the president of Electronic Arts, said that for EA.com to attract a substantial customer base, the game must truly appeal to a mainstream audience even more so than it currently does.
Wildfire has built a substantial customer base but now needs to figure out how to monetize them better.
Large ISPs like EarthLink Inc., MindSpring Inc. and America Online Inc. provide dial-up Internet service to a substantial customer base.
Both wanted a new location with substantial customer traffic, and they considered places such as Hollywood and Burbank.
Banks know they don't need to be better than the fintech companies; their advantages of scale and distribution ensure they can maintain their substantial customer base with a sufficient product.
The advice was first-rate, and the results have already triggered talks with a substantial future customer".
It offers startups access to its executives for advice, its marketing clout and introduces these young companies to Workday's substantial customer base.
The trustee's report concludes there was a substantial "shortfall" in customer segregated funds every day from Oct. 26, when $615 million in loans from customer accounts were not repaid, until MF Global filed for bankruptcy on Oct. 31.
In recent years the famously litigious Yuen sued the only other interactive guides that had substantial customers.
"In short," says Osha, "CompactFlash has won, and we believe investors should not be concerned by the proliferation of competing claims from memory card makers unless they see design wins at substantial customers, which has yet to happen".
He has endured a substantial increase in customer complaints — to 30 a week from about three — and has reduced his 2011 sales goals by 15 percent.
