Twitter is an endless firehose of new impressions, for the users that want that and RSS just bottoms out, you can mark everything as read and "beg for more". It

Twitter is an endless firehose of new impressions, for the users that want that and RSS just bottoms out, you can mark everything as read and "beg for more". It's too relevant and doesn't add random new stuff. The info-addicted brain (I have some of that, unfortunately) is rewarded by twitter.