crystal - crowdsource everything on the blockchain
TRANSCRIPT
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A Decentralized Application That Lets You Crowdsource Everything
Crystal
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A group of people working together to complete a task better than any individual
could.
Crowdsourcing
4Examples of Crowdsourcing2,966 Websites
Design
VideoAudio
Politics
BrandInnovation
Code
Science
Architecture
Art
Advert-ising
Car Design
Web Design
Advice
Consumer
Goods
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Contests To Gain Reputation/Money01 02 03 04
03 02 01
Contest Creators Creatives Critics Evaluators
Subjective Contests
Consensus Contests
ObjectiveContests
01 02 03 04
Winner Takes All Critical
Mass
Chicken and Egg Reputation
Cheats
1
2
3
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Description The user that creates the contest.
The user that performs tasks.
The user that critiques tasks.
The user that evaluates tasks.
Reputation HonestyPoints CreativityCoins ClarityCoins AccuracyCoins
Additional Details
Honestypoints are actually given to all participants,
based on pagerank algorithm called RAW
RelativeRank.
CreativityCoins can be split for cocreated items.
ClaritiyCoins calculated based on effect on final
decision.--
Reputation Transferable?
Users and Reputation Types01 02 03 04
Contest Creators Creatives Critics Evaluators
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DescriptionA contest that uses
subjective judgement to rank participants.
A contest that uses expert votes to rank participants.
A contest that uses objective criteria to rank
participants.A contest type that is created using our API
Technical Details
Scoring based on judges decision. Uses
RelativeRank to prevent collusion. kNN algorithm to match experts to contests.
Uses correlation coefficients as a scoring
rule, with weighted datapoints to prevent sybil
attacks.
Uses tools of decision theory to redistribute
coins, with an influence limiter on the scoring
function to prevent sybil attacks.
Standard API functions to describe redistribution of reputation and rewards. Cannot create coins, only
redistribute.
Versions
Public Optional
Private Optional
Contests in Crystal
01 02 03
Subjective Contests
Consensus Contests
ObjectiveContests
04
CustomContests
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?Winner Takes All?
$10,500
$9,000$6,00
0$3,00
0$1,50
0$30,00
0
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01
Winner Takes All
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Building a Community
Community
Business Sports Media
Football NewPricing Strategy Traditional
Reputation committed
Organization to ask initial questions
Company to handle support and frontend
Beta period and vote
02
CriticalMass
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DAO Allocation
Buy tradeable tokens that represent their
vote
InvestorsVotes based on their
CrystalCoins and HonestyPoints
ExpertsVotes based on the fee they’re paying, as well
as HonestyPoints
Contest CreatorsVotes based on how
many coins their questions are
responsible for distributing
Non-ProfitsOne contractor voted in at any given time. Contractor can split votes between own
stakeholders.
Contractor
03
Chicken and Egg
20% 20% 20% 20% 20%
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Reputation Cheats?
Creating Earning Transforming Transferring
Voted on by community
stakeholders
Earned through non-profit contests
or competitions.
Lose a percentage based on
similarity, and only transform coins.
Same rules as transforming.
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Real Life Use Cases - Product Creation
Mike’s Sustainable ToysHe’s one bad winter away from shutting down.
Mike chooses an “objective contest”. He chooses toys sold, margin, and environmental impact as metrics, and submits those metrics, as well as a simple written statement of what he's looking for.
Creatives from around the world who have proven they're good at innovating on consumer toys submit ideas, and they’re evaluated based on Mike’s metrics.
Mike takes the top scoring toy, the Modcar, and moves forward with design. Mike saves his company, experts get paid, and reputation goes to the top experts. Everyone leaves happy.
Mike’s ModcarsThe Sustainable Remote Control Car
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Real Life Use Cases – RFPs
Provably Fair RFP SelectionEnding broken promises and corrupt contracts I foresee the creation of a marketplace, with the order
book composed of Proposals on one side and DAOs RFPs on the other. ”
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Stephen Tual
COO– Slock IT
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Real Life Use Cases –Smart Contract Auditing
Transparent and Provably FairSecurity AuditsCreating decentralization in this crucial stage of the dapp lifecycle
Question: What kind of code inspection tool would have made it easier for users to immediately see this
[malicious code]? Perhaps we need to start standardizing... ”
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Vitalik Buterin
Founder– Ethereum
Real Life Use Cases –Decentralized Court
Make Fair Decisions in a Decentralized Way• Moderation• Storage or distribution of funds• Arbitration• Data Feeds
One crypto-institution that would be very useful for a large set of different applications is a mechanism by which a user could ask a question, expressed in the form of English text, and have a decentralized
mechanism… determine the answer, and then send a callback and a log to the user who asked the
question. ”
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Vitalik Buterin
Founder– Ethereum
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FAQ• Are you doing a crowdsale?
• Isn't this a bit ambitious for your first product?
• How will you make money when relying on revenue share?
• Wait, so you're saying you can sell reputation?
• Yes, once we've handled our legal obligations.
• That depends entirely on how much we make in our crowdsale. Our first priorities are HonestyPoints and the contest API, and we'll work up from there.
• We will work together with the DAO to develop the first few use cases, and get a steady stream of revenue.
• No., you can only sell CrystalCoins. There's no way to buy or sell reputation – at most the people who buy CrystalCoins can earn deserved reputation a bit faster.
