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.
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.