Amazon will be discontinuing its webstore services catering to small and medium size merchants. They have already started to advise their merchant to move over to other platform. Recently magento go and prostores also shut down. In recent years newer Saas based eCommerce platforms like bigcommerce and shopify has gained lot of popularity and attracted lot of customers as well.
The end date of the amazon webstore is not confirmed yet but it expected to be in 2016. The merchants would get enough time to evaluate another platform and migrate.
If you are webstore owner and looking for migration mail us at firstname.lastname@example.org for consultation and quote.