from
Jargon File (4.4.4, 14 Aug 2003)
banner site
n.
[warez d00dz] An FTP site storing pirated files where one must first
click on several banners and/or subscribe to various `free' services,
usually generating some form of revenues for the site owner, to be
able to access the site. More often than not, the username/password
painfully obtained by clicking on banners and subscribing to bogus
services or mailing lists turns out to be non-working or gives access
to a site that always responds busy. See {ratio site}, {leech mode}.