miss out on: To lose a chance for: missed out on the promotion.
http://www.thefreedictionary.com/miss out on

"Mercury" is a magazine that refused publishing the author's writings. He thinks it has lost a huge opportunity by not taking him in.

http://www.idoc.co/read/45621/wait-until-spring-bandini
"He began writing letters to H.L. Mencken, the editor of the famous literary magazine, the American Mercury, strenuously suggesting to Mencken that he publish his stuff. According to young Fante, the Mercury was missing out on the new Sherwood Anderson. The next Knut Hamsun."

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Note added at 22 hrs (2015-11-25 18:04:04 GMT)
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بكل سرور :-)


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Note added at 22 hrs (2015-11-25 18:06:14 GMT)
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Sorry about the typo in my answer's explanation, it should have been "... by not taking him on".