Scenario:
- The pool sends a mining.set_difficulty message with difficulty = 8.
- The miner ignores the message and submits shares that qualify at difficulty = 1.
- Most shares will be rejected by the pool with error = high-hash.
Question: what is the cost of submitting shares that get rejected? Are the accepted shares as valuable with an acceptance rate of 5% as if they were submitted with an acceptance rate of 100%?