Yesterday Amazon announced Flex and now their Teespring competitor. They're on a launching spree (see @jackdweck's Amazon Ecosystem collection). Interesting to see them focus on the gaming audience, which is something Teespring has marketed toward, particularly the YouTube Gaming/Twitch crowd.
@rrhoover I would expect Amazon to start offering this to Twitch streamers as an integration, so that they could sell tshirts within their twitch channel.