This rather begs the question as to why one should use Global distribution for an eBook. Surely a true ePub with Lulu and a Kindle with Amazon KDP fills the bill.
Think of it as strategy. With Lulu Press' "Global Distribution" your Epub is distributed through several venues the user selects. This saves the time and headache of having a multitude of separate accounts.
The downside is Lulu Press takes a cut of the royalty. Another downside when using Lulu Press' distribution is a cover that is good for the majority of venues isn't necessarily good for all venues -- one examply a cover showing a female nipple [even fuzzily] won't fly on either Kobo or Apple's bookstore since it might corrupt young minds and lose WWII for the Allies or something.
Going direct through KDP allows the work on all the various Amazon sites [where not prohibited by local requirements].
Some Self Publishers don't mind signing up with as many services as possible, some do. It's what works for the individual in question.
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