In most cases it’s advisable to list your books on as many sales channels as possible. You never know where you readers may be shopping. If you notice more sales coming in from one than others, consider promoting on that site or to the readers most likely to be frequenting that site.

For example, if your sales on iTunes are high, what does that imply? Perhaps you have readers in the teen/young adult range. I don’t have any evidence to prove it, but I suspect that listing your books on Google Play just might help your book show up in Google searches. Some find that going exclusive on Amazon in the “Kindle Unlimited” program pays off well in pages read, but if you’re not finding that to be true, expand your options.

If you list your books in multiple sites, be sure to consolidate them through one convenient link via Books2Read.com. For free, they will provide a single link to all sales channels, which is a lot easier to promote than trying to cover them all.