250 picodollars / byte-month is $3000/TB/yr, which is very expensive even compared to the already expensive S3 (~$276/TB/yr). For reference, HDDs cost ~$20/TB,

250 picodollars / byte-month is $3000/TB/yr, which is very expensive even compared to the already expensive S3 (~$276/TB/yr). For reference, HDDs cost ~$20/TB, so you could buy a new HDD every 2.5 days for the cost of storing the data on tarsnap.