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I still don't understand that, I don't earn any hive to power up like it use to be.

If you set your rewards to 100% power up, you will get fractionally more hive when hbd is below 1usd.
As the price of hive rises less is paid out on posts.
Hive is paid out to posts only when the price has dropped to near the haircut rule.
You can trade hbd on the internal market for hive with no fees.