important to IAPs because setting the user's home page to the IAP's Web site gave the IAPs advertising and promotional opportunities. Netscape, by contrast, refused to allow its IAP licensees to move Navigator's home page from Netscape's NetCenter portal site. 250.  Many IAPs would have paid for the right to distribute Internet Explorer. Indeed, Netscape was charging IAPs between fifteen and twenty dollars per copy of Navigator they distributed. Because of the features and convenience it offered, the IEAK significantly increased the price that IAPs would have been willing to pay. Nevertheless, Microsoft licensed the IEAK, including Internet Explorer, to IAPs at no charge. At the time Microsoft released the IEAK, Netscape did not offer IAPs an analogous tool. Although Netscape eventually followed Microsoft's lead by introducing a tool kit similar to the IEAK known as Mission Control, that kit was not made available to IAPs until June 1997 ? a full nine months after the release of the IEAK. Whereas IAPs could obtain the IEAK for free, Netscape initially charged $1,995 for each copy of Mission Control. 251.  Approximately 2,500 IAPs executed an electronic copy of a license agreement for the IEAK. Included in that number were the eighty IAPs that together accounted for ninety-five percent of all Internet access subscribers in the United States. The IAPs that executed an IEAK license agreement agreed to make Internet Explorer their "preferred" browsing software. The term "preferred" was not defined in the license, and Microsoft did not investigate the extent to