As of Tuesday, 34 word advertisements promoting AOL products and services are now being tacked to the bottom of e-mail messages sent from AOL accounts using the internet provider"s AOL 9.0 software. E-mails sent through AOL"s Webmail service, which is available for free on the company"s Web site, have had the ads attached for about eight months, said AOL spokeswoman Anne Bentley. Bentley said the ad is a reminder to people, especially those paying for AOL service, that many products like e-mail are now available for free. She said AOL, a division of Time Warner, received "a smattering of e-mails" complaining about the ads but said the company plans to continue using them, as opposed to subscription fees.