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Yes, the daily deals are still there, but they aren't as good as they used to be.
I've used Guttenberg for classics.
I don't borrow ebooks from the library much, because I have a habit of reading 1/3 of a book...and then putting it aside for awhile. Not good when you have a time limit.
I tried bookbub a number of years ago, but I wasn't into fiction at the time, which most of their books seemed to be.