ChannelAdvisor Adds Optimal Payments as Solution Provider

Montreal, Quebec, August 2, 2004 - Optimal Payments Inc., a wholly-owned subsidiary of Optimal Group Inc. (NASDAQ:OPMR), announces that it has partnered with ChannelAdvisor Corporation to integrate Optimal Payments' processing offering into the ChannelAdvisor software platform. ChannelAdvisor members can now process payments with the value-added provided by Optimal Payments' expertise in risk management and card-not-present transactions. ChannelAdvisor's members include sellers acquired through major marketplace and traffic partners such as eBay, Amazon.com, AOL, MSN and Yahoo.

About Optimal Group Inc.
Optimal Group Inc. is a leading payments and services company with operations throughout North America and the United Kingdom. Through Optimal Payments, we provide technology and services that businesses require to accept credit card, electronic check and direct debit payments. Optimal Payments processes credit card payments for internet businesses, mail-order/telephone-order and retail point-of-sale merchants, as well as processing checks and direct debits online and by phone. Through Optimal Services Group, we provide depot and field services to retail, financial services and other third-party accounts. For more information about Optimal, please visit the company's website at www.optimalgrp.com.

About ChannelAdvisor Corporation
ChannelAdvisor Corporation provides technology and services that enable leading online retailers to maximize their products across multiple e-commerce marketplaces such as eBay, Amazon.com and Overstock.com, comparison shopping engines such as Shopping.com, Shopzilla, Nextag and Google Product Search and search engines such as Google, Yahoo! and MSN. In 2006, ChannelAdvisor managed over $1.6 billion in gross merchandise value (GMV) on behalf of its customers. ChannelAdvisor solutions combine best practices, on-demand software and integration technology to help retailers sell more products, faster, by automating labor-intensive, manual functions so they spend less time optimizing campaigns and more time solving marketing and business issues. ChannelAdvisor's customers include, GSI Commerce, Sears, Brookstone, Abebooks and Motorola. ChannelAdvisor Corporation is headquartered in Research Triangle Park, NC with offices in Seattle, the United Kingdom and Germany. For more information, visit http://www.channeladvisor.com/.