Maybe I an overly suspicious but it feels like a hook up site with older men "dating" or hooking up. Here's a tweet with an odd comment.

https://twitter.com/MAMlTOMOES/status/821946787510353920

The accounts have what I guess are names with a price and a comment which usually says male approx age and links to this site which claims to diagnose you.

https://twitter.com/search?q=%22Customer%20Comments%22&src=tren

If you put in anything it gives you a post to tweet like the others and warns "[a few are suggestive.]"

I Googled Shindan was and found this Shindan maker on the same site

https://en.shindanmaker.com/

There is also a button that says "pick up" and number 5. says "pedo" and IDK if it's safe to click it....

https://en.shindanmaker.com/c/list?mode=pickup

Now I haven't found any pedo looking symbols but I know they use secret code on social media to sell and buy services and whoops maybe they didn't realize they were so busy they accidentally trended...