I have 300k+ on Tumblr! I built mine before I ever knew about massplanner. I was using automations from other sources by reposting photos from WeHeartIt with tags and showing up #1 in all the fitness tags (gaining 500 new followers a day). Tumblr, being like IG and FB lol, shut down those automations and kept shadow banning my problem. I finally have it back up now and am slowly growing again. Tumblr has been well worth it for me, I've made very good $$$ on there in the fitness niche with selling ebooks. I didn't find any of the mp automations useful though. What's best for Tumblr is uploading photos with good tags, self promoting/catchy caption when you reblog a pic, or mass sending messages asking for a blog rate (I've never done that but I've seen many others). If you guys have anymore questions on here!