For anyone else confused about the Twitter numbers reported in Table 1, I believe it should read "0.5-15 billion tweets/day" as opposed to "0.5-15 billion tweet

For anyone else confused about the Twitter numbers reported in Table 1, I believe it should read "0.5-15 billion tweets/day" as opposed to "0.5-15 billion tweets/year" on the first line, which is consistent with the claim that Twitter produces 500m tweets/day currently. When you make this adjustment, you recover their annual storage estimates. Still - this estimate is based on 3KB/tweet, which is probably derived from looking at the raw twitter XML feed - I'd expect this to compress easily down to 10-30x smaller than the author's claimed numbers - more with proper data modeling. Nevertheless - huge problems to be dealt with in the sciences and video.