Originally Posted by HarryT
Amazon already have an effective monopoly in the UK market, because we lack the strong second place player which B&N occupy in the US. I don't know what Kobo sales are in the UK, but they've got to be tiny compared to Amazon.
In the US they were at 6-8% at the time Rakuten bought them.
There are no signs it has gone up and a few it has gone down.
Any growth among non-Amazon ebook vendors in the US seems to be going to Apple. Apparently at the expense of the other ePub vendors more than Amazon.