TumblrMart is your new storefront for gifting joy to your friends on Tumblr. You can now gift Ad-Free Browsing and this April Fools infamous Summon Crab! button. A mobile release will launch soon, with more features to be added in the future. Gifted gifts include 24 hours worth of crustacean chaos ($2.99) or $4.99 per month or $39.99 for a year of Ad-free browsing.”]
Source: https://staff.tumblr.com/post/55648373578/important-security-update-for-iphoneipad-users