If your efficiency is lower than 1% at the end of a round, you will be flagged as inefficient and temporarily banned for 20 minutes while the user hopefully attempts to fix the problem. If this is a problem for you, please update your miner to our modified version of m0mchill's miner that is MUCH more efficient.
Pardon me if this is a stupid question, but I assume that the required efficience excludes CPU miners, is that correct?
Cheers,