==A game theory based virus==

I brought the idea from this famous solution for micropayments https://people.csail.mit.edu/rivest/pubs/Riv97b.pdf and even if it's obvious somebody wrote something even on second idea to build this mechanism http://eprint.iacr.org/2015/1015.pdf

CONTRACT

I will take hash of block 422321 of the Bitcoin blockchain and get an 0<=x<=1 from it then use this number to choose someone in the list of voters, each voter is counted according to its SP*voting_power (rshare) at the moment of the vote. The chosen person will get 10% of this post reward to his account in SD.

tl;dr This is the first lottery with free tickets, your probability(reward)/risk = infinte, winner extraction in about 5.5 days.

CODE

import json, re, requests, collections
from piston.steem import Steem

def extraction(random, votes):
tot_rshares = sum(map(int,[x['rshares'] for x in votes]))
tickets = {}
for vote in votes:
tickets[vote['voter']] = float(vote['rshares'])/tot_rshares
tot = 0
for voter in collections.OrderedDict(sorted(tickets.items())):
tot += tickets[voter]
if tot > random:
return(voter)

blockhash = json.loads((requests.get('https://blockchain.info/it/block-height/422321?format=json').text))['blocks'][0]['hash']
random = int(blockhash,16)/16.*(64-len(re.match('[0]',blockhash).group(0)))
votes = Steem().get_content("@rodomonte/social-attack-on-steemit").active_votes

print(extraction(random, votes))

[We don't need an ethereum contract to enforce this since all my incentives are to execute it: I don't want to get downvotes, I get a positive feedback for next lottery. And all previous lotteries correctly executed will builds an obvious trust.]

DILEMMA

If you vote - caring about your own return - you get a "probabilistic payment" but you damage the steemit idea because you get something for nothing, although if you don't vote or you downvote - caring about the steemit system - you don't eliminate the problem. The problem gets bigger every lottery, since every past lottery build trust.

REFERENCES

https://en.wikipedia.org/wiki/Prisoner%27s_dilemma

https://en.wikipedia.org/wiki/Free_rider_problem