It's been good! The hardest part was formatting the e-book. If you want it to look a certain way (rather than just converting it from a word document and letting the formatting do whatever it likes) it's kind of an involved process. There's some good software out there for it though -- Alkinea if you use OpenOffice, Sigil for formatting the ebook, and Amazon's own Kindle Previewer for seeing how the book will look on the devices.
Interesting. I've been writing my content using
Markdown, since I don't really have that much in the way of formatting needs. I used to use Sigil, but since I write on a bunch of different devices and sync my content over Dropbox, it's easier just to use a plaintext format. Still, knowing about the Kindle Previewer is helpful.
In answer to your question, I do get money for Prime borrows. I forget how much exactly; I know it's not a flat fee though, there's some kind of formula. I think it has to do with how many times my book is borrowed, out of the total number of borrows in the Prime library, or something like that. But yeah, go for it I won't post the link here, for fear of an ad-ban, but you can find the link on my nanowrimo page.
That's how I already tracked it down (and thus why I asked about the Kindle Direct thing). Personally though, I don't think most people would mind a single link, seeing as this is a thread for novel writing and the one on Amazon is in the same world as the one you're writing now (if I read that correctly). Plus, I don't think that Toady One has ever banned an actual person for link spamming (just ad bots with no other content), so I wouldn't worry too much about that.
Or heck, put it in your forum signature.
EDIT: I did a little reading about Amazon self-publishing. It seems like it would take more work on my end, for less profit, but without rejection by a publisher getting in the way. So long as the contract allows me to retain all rights to my material, including the ability to cancel the availability through them at any time, I'm sold. My only issue is that even though I can end the publishing through them, I have a feeling most major publishers won't publish a book that's already been published in any other form, so if I go through a major publisher later, it would be with new material. At any rate, this is getting ahead of myself; I need to finish the novel first.
I haven't looked through all that it entails, although I didn't think that it was too terrible if you already had your book in an easy to convert to ebook format.
And so far as the profit, is it really less? From the research I've done, publishing through a traditional market will get you 10-20% royalties. On Amazon, you'll get 70%. Granted, you don't get an advance which could be painful. Still, most royalties are in the sub $10,000 range, so if you really do think that your book could do well, I think I'd personally rather go for a higher percentage over time.
And I don't know about removing it from Amazon, but one advantage that they have is that you keep the full license. So you can sell it on the other eBook sellers as well, such as iBooks / Google Books.