"Hmm. 1% huh? I guess one person's spam is another person's meat. While I do know that spam activity is down some on Twitter, IMO, it's nowhere near the 1% mark. Twitter has cracked down on some things that do reduce the rate at which "random" spammers (as opposed to spam-for-hire businesses) - likely clamping down on account creation rules has prevented a lot of the serialized account generation, and subsequent hashtag spamming. The most telling thing for me: I turned off the SocialToo auto-return-follow service, and stopped getting new followers. But I'm still unfollowing quite several spammers per day (now down to ~3500ish) Those spammers tweet rather heavily when active. And that's to say nothing of the regular worm attacks that they have "spamming" everyone. Usable information (conversation, quotes, utterings, "non-spam") in Twitter streams is nowhere near 91% as this graph would imply. What percentage of the tweets you look at are not actively selling you something?" - guruvan (Rob Nelson)