Yes we definitely did experience limitations in the beginning. We heavily relied on our dotcom sales for initial traction and feedback. To test our idea, we carefully trickled in traffic for some long tail keywords from SEO and Google AdWords. We still don't do any advertising besides some branded placements on AdWords and Facebook.

Listing our product on Amazon.com created additional sales and a new market which was great. But we realize this is a 3rd-party platform which we can't control and don't want to become dependent on it.