Today, Shopify has changed its tune.

Today, Shopify has changed its tune.

The move also comes as a bit of a surprise, given that it was only a year ago that Shopify was warning merchants not to use Amazon's Buy with Prime as it was in violation of Shopify's terms of service.

 The company wanted its merchants to use its own payment and checkout service, Shop Pay instead. As a result, merchants who wanted to use Buy with Prime previously had to do so outside of their Shopify admin tools.

"We’re on a mission to make commerce better for everyone. That means making sure our merchants are able to sell everywhere. To do this, we’re committed to giving our merchants and their customers more choice," Shopify wrote in its announcement.