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No, I didn't make any post.

Okay, #hpud happens every 1st day of the month. The least amount is 10 Hive. The more you power up, your stake grows giving you more voting power. You can choose to delegate your HP to any active curator's account on Hive or not. Whichever is the case, you get curator's reward for any post voted for.

Also you get a #hpud badge from @hivebuzz each month you power 10 Hive and above.

I got it. Have to wait till next month