This reminds me of S07E01 of the TV show Black Mirror, which tells a story about a free brain tumor operation, followed by a monthly fee for "remote mind hosting". The standard plan goes worse and worse; your brain needs to serve as a computational resource while sleeping, and they keep pushing you to upgrade to Plus or Lux plans.

Yep, it's a very disturbing and depressing episode that feels (like a lot of Black Mirror) all too possible.

The Black Mirror episode description reminded me of Tom Scott's short Welcome to Life.[1]

[1] https://www.youtube.com/watch?v=IFe9wiDfb0E

This is actually a quite interesting game, I played it for like 2 hours when I saw it first time.

Decreasing the number of columns looks like rotating some noisy parallel lines counterclockwise. Very fun.

There's a book called "Proofs without words". Fun to have a glance. (https://ia801405.us.archive.org/24/items/proofs-without-word...) It also has a sequel.

Very interesting problems and satisfying solutions