马翼龙收购推特后已经看到

Mastodon: 各种新站开张
Inoreader: 通过 Inoreader 订阅来自 Mastodon 的 RSS
Tumblr: 快来tumblr我们会尽快支持activitypub，我们还招收推特员工

有种一鲸落万物生的赶脚 (推特故障图确实是鸟拉鲸鱼

Tumblr目前的成人内容限制：

Sexually Explicit Material.
Visual depictions of sexually explicit acts (or content with an overt focus on genitalia) are not allowed on Tumblr. That includes pictures, videos, GIFs, drawings, CGI, or anything similar. Historically significant art that you may find in a mainstream museum and which depicts sex acts...are now allowed...
Nudity and other kinds of adult material are generally welcome....

描绘露骨性行为的图影和图影创作不行，裸体图和小黄文是可以的。
Tumblr在2019年被Automattic公司收购，Automattic是wordpress的主要维护方之一，目前是WordPress.com和Gravatar等等网站的所有者。