TRIBUTES on the Web site of Richard J. Gordon‘s company strike all of the uplifting chords one would expect of a digital maverick. He is described as a “trailblazing businessman” who is “operating in the front ranks of those transforming the Internet into the global marketplace of the future.”

There is an echo of truth in all of this. Though most Internet buffs have probably never heard of him , Mr. Gordon, 62, played a significant role in the birth of electronic commerce. While Amazon.com and eBay were still fledgling enterprises, the companies that Mr. Gordon founded in the early 1990s were already laying the groundwork for electronic transactions conducted with credit cards  a development that opened the doors to the first generation of e-commerce start-ups.

And if the Internet is for porn, as the hit Broadway show “Avenue Q” asserts, perhaps it was only natural that many of Mr. Gordon’s early clients were purveyors of X-rated entertainment.

While riches were being minted and squandered in the dot-com ’90s, Mr. Gordon made a fortune by taking a commission for processing sales on a range of sites from small, mainstream retailers to others like ClubLove, which published the Pamela Anderson-Tommy Lee sex tape. Today, his payment processing company continues to have roots in the world of sexual entertainment. One of the several companies he owns or operates, Processing Solutions, facilitates credit card transactions for the Web sites of DTI, or Dial Talk International, according to current and former employees familiar with the arrangements.