http://www.nytimes.com/2015/10/08/business/amazon-challenges...
But, don't let that stop you...
Just my opinion though. Who knows for real.
50K items posted in the last 30 days and 100-200k sellers (who knows if that excludes inactive). Perhaps it has gained some ground.
https://www.reddit.com/r/handmadeamazon/comments/3xncph/how_...
http://www.nytimes.com/2015/10/08/business/amazon-challenges...
But, don't let that stop you...