Minmin
June 13, 2019. Block 37 pays 10 mBTC, the cross sum of 37. The question: "I created a new word. Minmin. What does it mean?" The answer is two words. The TOMI field is four words of four letters each. Digits 394, d and 49.
Then the fastest hints so far. Players voted for a hint every five minutes. A homonym about Bitcoin. "How do you mine the quizchain?" The first word is Mine. Then You all.
Mine with your mind
Minmin is short for Mindminer, someone who mines the quizchain by thinking. The answer is Quizchain player. The TOMI field is Mine with your mind, and mind and mine share three letters.
u/Randomiser had it before the fifth hint. The claim confirmed at 04:57:56 UTC, 57 minutes after the post. The author called the format stressful. Several players didn't like it either. You had to be awake.