. means function composition in Haskell. (f .) . (+) is just an obscure way to write \x y -> f (x + y). It’s not recommended to use this point-free style in production code, but it is sometimes fun to experiment with for challenges like this.

They are considered volunteers in the Netherlands as long as the compensation is way below market rates. I don’t understand why you think this is a problem.

In the Netherlands, volunteers can be paid up to €5.60 per hour and up to €2100 per year (tax-free).

The Netherlands also has mandatory ID.

It’s e2e encrypted, so what could they do if they were evil? (honest question)

Not only is it convenient, it also enables parallelism:

“How to Think about Parallel Programming: Not!” - Guy L. Steele Jr. (Strange Loop 2010)

I’m confused. It does go straight to the discourse post when I click it.