HackMD
Sybil Report on Gitcoin Grants Rounds 10
tags: gitcoin Reports
Updated by December 2021
Authors: Danilo Lessa Bernardineli
This doc reports how the Gitcoin Contributions Graph changes when it is modified so that users are excluded based on a list provided by the Sybil Detection Algorithm. Summary statistics and a estimate of the Fraud Tax is computed (as defined at https://hackmd.io/e2mZ9UT7QRGMh5tg6OCXfw).
Parameters
Algorithm Aggressiveness: 20%
Matching Pool: 700k USD
Algorithm Aggressiveness tunes how much sensitive / specific the flagging model should be. When it is set to 50%, then it will be optimized for accuracy, while closer values to 0% means that it will be optimized for minimizing false detection rate
Links
- Flagged users CSV: https://www.dropbox.com/s/i1ggr53fv3l252a/users-to-shutoff.csv?dl=0
- Match & funding stats per grant: https://www.dropbox.com/s/ezl2ku5nvr2yuhi/r10_grants.csv?dl=0
- R10 Contribs & User data: https://www.dropbox.com/s/8t6tyj79uia9in7/GR10-data.zip?dl=0
Summary Statistics
Total Contributions (original): 320295
Total Contributions (modified): 320295
Matched Contributions (original): 320295
Matched Contributions (modified): 289417 (90.4% of original)
Total Contributors (original): 14203
Total Contributors (modified): 12933 (91.1% of original)
Median Contribution Count per User (original): 11.00
Median Contribution Count per User (modified): 11.00
Mean Count (original): 22.55
Mean Count (modified): 24.77 (109.8% of original)
Grant Statistics
Total Grant Funding (original): 700000.00
Total Grant Funding (modified): 700000.00
Mean Grant Funding (USDT, original): 772.63
Mean Grant Funding (USDT, modified): 776.91
Median Grant Funding (USDT, original): 0.48
Median Grant Funding (USDT, modified): 0.51
Grant count (original): 906
Grant count (modified): 901
Fraud tax
Max payout (USDT): 714394.79
Fraud Tax: 14,394.79 USD
Taxation Quotient: 2.05%
Notes from 2021-12-22
Samples = 94 (34 true)
Estimated Sybil Incidence: 36.2% (between 26.1% and 45.4% 95% CI)
