Not exactly. Turns out you can sell via Amazon, or you can sell directly, but if you use the undocumented Amazon-only tool to construct your .mobi, you can't sell that directly. And Amazon is now blocking the output of many/all other ebook construction software so you can't use Send to Kindle or email. USB is the only option to load a book.
Just yesterday I used http://epub2mobi.com/ to convert a public domain ePub file to MOBI, then sent that to my Kindle's email address. It was delivered wirelessly to my Kindle. Are you sure this hasn't changed? Or is epub2mobi doing something to circumvent this?
Do you know which publisher sells for all your favourite authors? I certainly know for some of them, but not others. What about when you just hear about a book from someone? This is why people go to bookstores.
I'd be a lot happier if everyone went to no-DRM or at least interchangeable DRM so you could move to a different e-reader. Amazon and iBooks are the odd ones out. iBooks doesn't have a big marketshare, but Amazon definitely does.
they can, and many try, but for the most part people don't buy books outside of their chosen e-reader platform (ibooks, kindle store, kobo). Amazon has significant value to add that they've built up over time and that publishers can't easily get: recommendations, integration with e-reader devices, a huge amount of traffic, and a huge number of people with one-click purchasing already set up.
http://devblog.avdi.org/2014/04/02/why-does-amazon-hate-eboo...