Brands The Average Sponsored Post on Tumblr Gets Reblogged 10,000 Times. Here’s Why “The average post on Tumblr gets reblogged about 14 times. The average sponsored post on Tumblr gets reblogged 10,000 times,” said Yahoo’s CEO Marissa Mayer yesterday at the 4A conference. “So, there’s really an amazing amount of reach.” For those contemplating Tumblr’s value to brands, that reblog rate is an incre