[dudzik]

I wonder why they didn’t archive the most relevant tweets only. A library keeps only a subset of all available books in its archive as well.

Edit:

From the article, there are copyright issues when archiving tweets. The people tweeting own their tweets. So the archive doesn’t want to expose itself to that risk.

[dekhn]

See https://en.wikipedia.org/wiki/United_States_Copyright_Office... with respect to copyright.