I have about 10 Tumblr blogs with 3K all the way up to 125K followers all NSFW and i find Tumblr as a GOOD source of traffic if you do it right. Make sure your queue is always full and post 30-50 images/GIFs a day with proper tags. It's not rocket science, just think what Tumblr is - a social network. So - be social! Interact with your followers, post reblog DM. You can drop an occasional affiliate link here and there but the right way to do it as somebody up said is watermarking. A good image with your site's URL can go viral and spread not only on Tumblr but on Twitter , FB (IF it's not pure porn), Reddit etc . Doing it all manually is kinda time consuming but there are a number of good cheap bots that help. I load up the queues of all the blogs maybe once a week and login and "being social" in the bigger blogs a few times a week. Lots of horny guys on Tumblr, take advantage
