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.