that's a really great idea, and thanks for taking the trouble to do it, but it might be better if you add your suggestions to the wiki lists instead of starting a new thread.
https://wiki.mobileread.com/wiki/E-book_stores
https://wiki.mobileread.com/wiki/E-book_stores_table
the wiki has lots of good information. there is a link to it in the upper left corner of the page.
have fun finding some good books to read...
cheers !