"Using LiveJournal.com for syndication
Here you can add syndicated feeds (RSS) from other sites to your friends list, removing the need to check a dozen sites every day.
All users have a quota for how many feeds they can befriend, based on account type. Befriending a syndicated account costs a variable amount, depending on the popularity of the feed. Popular feeds cost less, as the expense of the system maintaining the feed is shared by all the watchers. If you're the sole watcher of a feed, it costs 1 unit. If there are 5 people, it costs a half unit. At 25 people, one third of a unit, and so on... "