Xanga first added weblogs to all Xanga Sites on November 5, 2000. Comments were added soon after, on December 8, 2000, along with the concept of "eProps", which a user can give to another user's entry as a sign of how much he or she has enjoyed the entry. Two "eProps" is the maximum amount that can be given. (By default, "2 eProps" is selected on the comment page.) Comment Tracking followed on January 18, 2001.
A core part of Xanga is the ability to subscribe to other Xangas. Subscriptions allow Xangans to stay up-to-date on other Xangas to whom they are "subscribed", without needing to manually visit each site. Xanga first added an email subscriptions feature on November 30, 2000. In January 2001, this was followed by the ability to subscribe to a site using a web-based reader using RSS (and the ability to display subscriptions on one's site).
Initially, Xanga allowed members to subscribe to each others' sites anonymously. Some users were troubled by anonymous subscriptions, and so during the week of July 15, 2003, support for this feature was discontinued. Since some users had been using anonymous subscriptions to try out subscriptions to other sites, on July 21, 2003, Xanga added a feature that allow members to sample a Trial Subscription to another site. This update also allowed member to hide individual subscriptions from public display.
Subscriptions were originally called "Sites I Read", so some older users sometimes refer to them as "SIR".