Good question. To be in Kindle Unlimited, I think you need to be in Kindle Select.
To be included in Kindle Unlimited (KU), you must meet the KDP Select requirements and enroll your Kindle eBook in KDP Select. If you don’t want your Kindle eBook in Kindle Unlimited (KU), you have the option to remove it from KDP Select.
This is what Kindle Select says:
Your Kindle eBook must also be exclusive to the Kindle Store for the KDP Select enrollment period.
So, yes, you'd have to remove your book from Kindle Select and Kindle Unlimited. I think each author has to decide how much benefit they are getting from these programs and make a decision based on that.
As an exclusive to TheNextBigWriter, I wanted the site's members to be the first to gain access to videos about Booksie Limited Editions (BLEs). No one else has this link, not even Booksie members. We hope to launch on Thursday. If you decide to publish a BLE, let me know and I'll feature it.
https://youtube.com/playlist?list=PLQ5e … 28knPeffw1
Thanks for pointing this out.
Sol