No need to redact, shouldn't have to go to an outside source to get the necessary instructions. (IMO)

how do you invite someone to join your clan

I like this solutions, its very clean and readable... for the most part, you've simplified things that should remain simple.

Excellent kata, and very challenging for someone who's just learning functional programming. I spent a good deal of time reading and researching before the lightbulb turned on. Very rewarding, Thanks!

I hate to nitpick, but the c# function is defined to return a string but your test cases are expecting int .

Should the above comment be marked as a spoiler?

splitting hairs here... you're being passed 'content' as an argument...
then you immediately change it to 100, not what I call a best practice. But I like your equation