Services Services provided to publishers include traffic analysis and an optional advertising system. Though it initially was not clear whether advertising would be well-suited to the RSS format, authors now choose to include advertising in two-thirds of FeedBurner's feeds. Users can find out how many people have subscribed to their feeds and with what service/program they subscribed. Published feeds are modified in several ways, including automatic links to Digg and del.icio.us, and "splicing" information from multiple feeds. FeedBurner is a typical Web 2.0 service, providing web service application programming interfaces (APIs) to allow other software to interact with it. As of October 5, 2007, FeedBurner hosted over a million feeds for 584,832 publishers, including 142,534 podcast and videocast feeds.