Who said Twitter DOESN'T keep a record of your tweets? What's been said is that Twitter doesn't let users access any archive of your tweets they may well have,

Who said Twitter DOESN'T keep a record of your tweets? What's been said is that Twitter doesn't let users access any archive of your tweets they may well have, and that they may well continue to mine. Your point makes me want to revisit the standard terms under which users license their original tweets to Twitter.