Sio, is there an advantage to publishing direct with Kobo? Smashwords uses them as a distribution channel along with Amazon, Barnes & Noble, Apple, and some others. The last time I put a book out on Smashwords, they provided an ISBN free. I do not know how long that will last.
Yes there is an advantage. You keep more of the money. ( smashwords is a 3rd party in between and they take 10% ) take that out and you have 10% more in your pocket. Also by going direct you dont have to wait for smashwords who are lazy and slow to get your stuff out there.
Now having said that if you use draft2digital you can be on barnes&noble in 24hrs. Thats how fast it was for me
I have gone through smashwords and draft2digital and they really only exist for FOLKS who are not in the USA and cannot publish direct.
You can go direct through amazon, kobo, itunes. But not sony or barnes&noble unless you are in the USA
Having said that ibooks is a pain in the ass i tried to get set up with them direct and got error messages. Got on the phone with them and they just send you in a loop. So i went through draft2digital for barnes and noble and ibooks.
Smashwords ISBN is just for there. So is createspace.
If you sell on ibooks you will need another one.
you dont need one for kobo or amazon