>now suddenly "reading" books that have been available in a huge variety of formats in the public domain for years because they show up on Instagram?I can't speak to the 300k number but an increase in readership is plausible because I saw how reducing friction to consume a book can massively change reading habits. E.g. my friend with the new Kindle finally got around to reading the classics like "Madame Bovary" and "Anna Karenina" because she could get ebooks from Amazon for $0.00 (or sometimes a tiny amount like 95 cents).
The previous existence of those public domain books on Gutenberg Project's website was irrelevant since the HTML or TXT files weren't easy to consume unless one printed them out on a printer.
Yes, public domain books have always been sold on Amazon as real paper books but the shipping would end up being $3.99 even for a book costing $0.00.
The Kindle e-reader was the technology to enable her to read public domain books for free with minimum friction. (Even a trip to the public library to check out and later return a physical book for "free" is too much of a hassle.)
I can see how this NYPL project is trying to make a friction-free book reading experience for Instagram users who already own their smartphones. No Kindle purchase necessary. (In my other comment, I mention how millions of Chinese people are reading books on their smartphones.)