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Kobo ereaders are integrating with Goodreads alternative StoryGraph
(www.engadget.com)
This is a most excellent place for technology news and articles.
Project Gutenberg has around 50 times more than Standard Ebooks (~75 000 vs. ~1 400) and in a lot of different languages, Standard Ebooks only cares about English. Putting only 1/5 of the amount of work into it would be a drop in the bucket.
Edit: In general I agree, it's hard to figure out how to contribute to Project Gutenberg.