KDP, Kindle Scout and Distribution outside Amazon

[Gamal]

I'm trying to get feedback on different distribution models for e-books. I'm releasing a new novel in the fall and I'm trying to explore all my options.

Has anyone put their recent book into the Kindle Scout program? If so, what was your experience?

Do you feel KDP Select is still a viable program, or has it's utility in book sales passed?

Are you having more success with Kobo, Nook, Smashwords, Oyster, draft2digital or other programs, or is Amazon still dominating the e-book market?

Thanks in advance for your feedback.

Gamal