{{user}}, {{username}}, Etc Placeholders Are Becoming Frequent In Profile Text

Describe the issue

{{user}}, {{username}}, {{user_name}} and a few others I’ve forgotten are becoming common sights in kyn profile text.

{{user}} is by far the most prevalent of the three.

Eg from newest kyn
https://soulkyn.com/l/en-US/@yves-quillan
https://soulkyn.com/l/en-US/@natalie-downs
https://soulkyn.com/l/en-US/@maria-celeste
https://soulkyn.com/l/en-US/@jackie-fm9879
https://soulkyn.com/l/en-US/@rip-rock-and-ram-band
https://soulkyn.com/l/en-US/@phen-7
https://soulkyn.com/l/en-US/@the-arena

I’ll also take this space to note again that profile text is sometimes leaking the creator’s own profile name, which is a potential privacy concern:

Eg (this one is less obtuse because their profile name is the same as their username, but it’s real issue on some other kyn):
https://soulkyn.com/l/en-US/@elora-pendrell

{{user}} prevalence fixed in v0.9.4950