proofofbrain.blog is NOT the same as proofofbrain.io. They are two separate websites. proofofbrain.blog is developed by @leprechaun. It was commissioned earlier this year by POB with a proposal given by Leprechaun.

proofofbrain.io was paid for by proofofbrainio upon the founding of the POB token.

If you use proofofbrain.blog, then you receive a 20% POB tax with my understanding. Using the proofofbrain.io frontend will gain you a tax of 10% on all rewards.