For others, it is an additional sales portal that adds yet another revenue stream. (theresumeclinic.com)
Valve recently withdrew SteamOS machines from its direct online sales portal, saying it was working to reconfigure the platform. (technewsworld.com)
Which means that if you're serious about selling more books in other markets outside the US, you may have to look at other sales portals for your book marketing. (amarketingexpert.com)