UBID RANKS NO. 2 IN TOTAL REVENUE SHARE IN ONLINE AUCTION MARKET

ACCORDING TO NIELSEN//NETRATINGS AND HARRIS INTERACTIVE

CHICAGO, IL – July 5, 2001 – uBid, a leading retail online auction and e-commerce marketplace and majority-owned operating company of CMGI, Inc. (NASDAQ: CMGI), ranks No. 2 in total revenue share in the online auction market, according to the May eCommercePulse issued by Nielsen//NetRatings and Harris Interactive.

The eCommercePulse findings come concurrently with uBid’s recognition as the Top E-Business Winner in the Internet Companies Category in this year's InternetWeek 100, an annual study conducted by InternetWeek magazine that highlights the 100 biggest and most successful businesses across 10 major industries that are leveraging Internet technologies to drive e-business results. And, increasing transaction loyalty among users is reflected in uBid’s consistent ranking as a leading e-commerce merchant based on actual credit card transactions as measured in the NextCard E-commerce Index. uBid rounded out the top 5 list in May 2001, which included Amazon, eBay, Half.com and 1-800 Flowers, in that premier metric of monthly online consumer spending.

“We believe our success and growth is due to the incredible value we provide consumers through a niche business-to-consumer/small business marketplace,” said Alan Cohen, senior vice president of marketing at uBid. “This marketplace has allowed us to provide consumers with significant savings and product warranties on brand name products via our relationships with leading manufacturers such as Hewlett-Packard, Sony and Compaq.”

“We have converted niche focus into consumer loyalty, providing the foundation for our future work,” Cohen added.

According to the Nielsen//NetRatings and Harris Interactive report, consumers spent $556 million at online auction sites in May, up 149 percent from the preceding year and up 65 percent from the preceding month. Spending at online auction sites comprised 10 percent of U.S. consumers’ overall spending in May, up 2 percent from the same time last year.

The Nielsen//NetRatings’ report is based on an online survey of 35,000 randomly selected Web users, which collects information on Internet user behavior including, spending, demographics, and customer satisfaction.

Neilsen//NetRatings and Harris Interactive: Top Auction Sites Ranked by Revenue Share May 2001

Rank Site Revenue Share Satisfaction Rate Conversion Rate

1. eBay.com 64.3% 8.42 22.5%

2. uBid.com 14.7% 7.87 11.0%

3. Egghead.com 4.0% 7.75 8.0%

4. Yahoo! Auctions 2.4% 7.84 4.4%

5. Amazon Auctions 2.0% 7.64 6.5%

Source: Nielsen//NetRatings & Harris Interactive eCommercePulse, May 2001

*Auction sites do not include travel related sites.

**Figures for eBay.com do not include figures for Half.com.

About uBid

uBid, a majority-owned operating company of CMGI, Inc., is a leading retail auction and e-commerce marketplace that offers consumers and businesses three ways to buy and sell. The company’s Internet auctions feature a rotating selection of more than 12,000 products daily in 16 different product categories, providing consumers and small to mid-sized businesses with the opportunity to purchase a wide range of brand name merchandise, often at greatly reduced prices, through live-action bidding. Product categories include computers; computer peripherals; computer components; home office; housewares; sports and hobbies; jewelry and gifts; accessories; off-lease computers; consumer electronics; digital cameras and video; apparel and linens; home improvement; travel and events; collectibles; and everything else. In addition to uBid’s own auction listings or uBid Direct, uBid features uBid Preferred Partner auctions in which consumers will find products listed by uBid-approved businesses and backed by uBid or brand warranties. Users can also buy or sell products through uBid’s Consumer Exchange, in which consumers list their items for auction with no listing fee.

With more than 2 million registered users, uBid is committed to providing its customers with the highest quality auction experience on the Internet and offers supplier warranties on most consumer products. uBid also meets Better Business Bureau Online standards, which gives customers the confidence and security to bid safely online. For more information, visit the company’s Web site at www.ubid.com.

uBid and uBid.com are trademarks of uBid, Inc. All other products and services mentioned may be trademarks or service marks of their respective owners.

CONTACTS:

Denise Mancini

Manager, Public Relations

773-272-4562

denisem@ubid.com