I'll bet the step function in late 2013 was the onset of registration spam.
http://go-to-hellman.blogspot.com/2014/02/crowd-frauding-why-internet-is-fake.html <http://go-to-hellman.blogspot.com/2014/02/crowd-frauding-why-internet-is-fake.html> Another feature I recognize is the annual dip at Christmas. Eric Hellman President, Free Ebook Foundation Founder, Unglue.it https://unglue.it/ https://go-to-hellman.blogspot.com/ twitter: @gluejar > > Message: 1 > Date: Mon, 4 Jan 2016 17:28:02 -0500 > From: Tom Morris <[email protected]> > To: Open Library -- technical discussion <[email protected]> > Subject: [ol-tech] OpenLibrary new accounts > Message-ID: > <cae9vqefz_kasgb9gqpbtkstvht-oqmucgvn-cnjpd41dy1f...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Happy New Year everyone! > > I made a quick chart of the count of new accounts created by date which I > thought folks might be interested in. > > The count on 2014-3-13 is actually 6549, but I clipped it to keep from > distorting the graph too much. It corresponds to a mention on > reddit.com/r/books <https://redd.it/209un2> which generated seven times > more signups than typical for that period. > > Some other peak days, with account counts, include: > > 2011-02-24 2644 > 2012-11-26 2087 > 2014-07-22 2020 > > Anyone know what they correspond to? > > Tom
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