> Are people farming karma to later sell the accounts to shill products?

> Yes.

I wonder who buys though. I had an account which was 9 years old, over well over 100k karma and I decided I would delete it. Before doing so and out of curiosity, I contacted a couple of accounts that said they bought accounts. I was offered $20 (twenty) dollars. No more. Deleted the account.

If that is a representative amount then it's a lot of 'work' for no real gain.