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RE: Why didn't facebook implement the dislike button?
i think its hard to implement this. Unless you want to turn into akasha. they actually pay the authors in amounts, but this means it goes out of your pocket. have you thought about the tech behind this?
I'm no techy but @demotruk is
What is difficult about it exactly?
The only change is that a payout recommendation is included in the vote transaction (defaults could be applied either client side or on the blockchain consensus level), and that at payout time, the median of those (based on r-share weight) is chosen as a threshold. If the payout would be above the threshold value, the threshold value is paid out instead. Technically, it is very straightforward.
I am no tech. I should probably write my comment in a question form :) I just don't understand where the threshold value to be paid is coming from. the same way like upvoting?
Ordinary users could continue to see the exact same upvotes we see today. Only larger stakeholders might want to actually include a payout recommendation other than the default (which could be something crazy high like $1,000,000).
The users who do want to include a payout recommendation could do it in a variety of ways. They could be prompted to add a recommended value to every vote, or they could have a range of pre-chosen values like in the image below:
As for how the median value is actually chosen, well that's pretty straightforward. You take all the votes and you rank them in order of value. You weight each vote by their r-shares, in other words the "size" of the vote where bigger stakeholders generally give bigger votes. Then you take the midpoint of that, and that value is your payout threshold.
Imagine we have 4 voters, blue, yellow, red and green. They each upvote the post and include a recommendation. They all each have different amounts of Steem Power, so their votes are not the same size:
To get the median we rank them with the highest values at the top, and the lowest at the bottom. We then take the point in the middle as the threshold.
That threshold would only then apply if the 4 voters had enough voting power to reach $100 in the first place.
it would be interesting to see this in practice. I suppose the value of payout is relative to volatile steem price in the market, right?
Yes it is. This would slightly reduce this volatility, since the threshold is independent of the Steem price.
this would mean you pay out of your pocket.
The money is still coming 100% from the reward pool.