I’m sharing this link because (even though it’s geared toward freelance creators and consultants), some of it may actually apply to you (whatever you do). Especially since it’s reached the point where people who write and publish the traditional way are as desperate for their work to be visible as those of us who choose to publish ourselves. As a result, many of said writers have become consultants and/or freelancers (or Uber drivers) just to cover the damn bills.
Technically, I'm not "exclusively" Amazon, but I haven't sold anything on B&N. CreateSpace was easy to use and free. (Once they folded CreateSapce into KDP, I started having problems with images that fit just fine in MY files being flagged as too big for non-full-bleed printing in THEIR system.) On other sites, I've run into file-size limits (many of my books are heavily illustrated), complex account set-ups, requirements of text-authentication (I'm cellphone-less), or fees that I can't afford.
Technically, I'm not "exclusively" Amazon, but I haven't sold anything on B&N. CreateSpace was easy to use and free. (Once they folded CreateSapce into KDP, I started having problems with images that fit just fine in MY files being flagged as too big for non-full-bleed printing in THEIR system.) On other sites, I've run into file-size limits (many of my books are heavily illustrated), complex account set-ups, requirements of text-authentication (I'm cellphone-less), or fees that I can't afford.
So my only income is what gets put on Amazon.