From instructions on how to opt out, look at the official staff post on the topic. It also gives more information on Tumblr's new policies. If you are opting out, remember to opt out each separate blog individually.
Please reblog this post, so it will get more votes!
heres my advice to any followers i have who are young. Don't delete things when you think you've outgrown them or they're cringy. If you make youtube videos just private them don't delete them. Save your files, you can bury them in multiple sub-folders if you think they're cringe now but DON'T DELETE THEM! It doesn't feel like it now but years in the future you will look back fondly at who you were and wish you still had those things.
shoutout to the slow artists. the artists with hardly any time for art. the artists who reach the end of the day with no energy for art. you got this i believe in you and you are no less valued than anyone else