@Switch Blayde
If I place my novel on Bookapy, it will also be for sale on Amazon. I will only have one version of the ebook which means that cover page will also be on the novel for sale on Bookapy.
Is that in violation? They are clickable links.
It would be weird for readers, but fine for me for now to make it easy for authors to make their books on Bookapy without too much work. Although, it would be foolish for you to direct buyers from Bookapy to Amazon considering the difference in royalties that you get.
Also, I need clarification on "Any promotional links." On SOL (end notes, blogs, etc.), are you talking clickable links only or is in violation to simply mention the novel and where to get it (without a link)?
Something like [Book available for sale on amazon, search for 'book name' or 'author name'] is a violation. You're using SOL/FS/SFS to promote your book sales on a competing site.