I was just reading about Draft2Digital, a service similar to Smashwords. According to their website (https://www.draft2digital.com/), they distribute to Amazon, B&N, Kobo, iTunes, and Createspace and are looking at several others. They DO NOT have ISBN's. Unless they have some other arrangement with the retailers, you would need to get your own ISBN, which can be pricy.
I'm just curious if anyone has used them or what gossip might be circulating about how their services are.