In yet another setback to his ambitious expansion strategy, Ideon Group Inc. chairman Paul G. Kahn has abandoned the company's cobranded credit card and fired a top executive amid a 75-job downsizing.

Ideon ended its half-year-old servicing arrangement last week with the slow-growing PGA Tour Partners MasterCard, issued by a unit of Orlando-based SunTrust Banks Inc. Sixty of the 75 firings were related to the Professional Golfers Association program, the company said.

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