Not really. I've read some fiction ebooks that were self-published by authors and some were good. None had advertising (at least I haven't noticed), some had a

Not really. I've read some fiction ebooks that were self-published by authors and some were good. None had advertising (at least I haven't noticed), some had a suggestion to donate, but that's another story. Also, if we can say the comparison with software is valid, there is a lot of software (of various quality from a total trash to exceptionally good stuff) that comes gratis and doesn't try to sell you anything.