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Well, the trickiest part is in how you get to the 74.7 figure displayed next to the post... I never bothered to go through the code, but one could do that and then understand :-)

Someone approached me with a payment, on comment that he was unable to understand at all:

....best part: I could not explain it to him. :D

75% of what it shows, goes to the one who wrote the text.

25% goes to those who voted the text.

That 75% is then divided into 4, with one part going to the wallet as steem power, and three parts as steem dollars.

This is incorrect.

The author's cut is divided by 2 not 4 ( 50 / 50 )
One half ( of its US$ value ) is paid in sp, the other in sbd.

On top of that, some witnesses publish a 'bias' which means instead of getting the US$ quote for 1.000 STEEM to calculate the payouts, they calculate based on for example 1.2 STEEM ( 20 % bias ) and calculate your SBD payouts accordingly.

This will effectively give you more SBD than were shown in the 'payout'.
The idea is to stabilize the price by minting more coins to meet the demand.

"One half ( of its US$ value ) is paid in sp, the other in sbd."

The current value of STEEM is about a third of SBD. I always get 3/4s of the number in SBD and 1/4th SP.

The current value of STEEM is about a third of SBD. I always get 3/4s of the number in SBD and 1/4th SP.

That is coincidence. If you select 50 / 50, it is 50 / 50.
However, my explanation above doesn't make much sense, now that I have read it again ...

If the payout shows 10 $ after taking off the curator's cut, then you will get:

5 US $ worth of SP
5 SBD (+some extra because some witnesses publish a 'biased' feed at the moment)

What's here not to understand? The curration cut here is below 25%, which is the maximum a curration cut can be. Am I missing something?