"Pennying" as a strategy to win more auctions, and how to deal with it

[harisang]

FYI, since the discussion has been ongoing for almost 2 weeks, the CIP for banning pennying has moved to a snapshot vote.

CIP-13: Rules of the Solver Competition Update: proposal to ban pennying

CIP: CIP-13 title: Rules of the Solver Competition Update: proposal to ban pennying author: @harisang, @marco status: Voting created: 2022-09-05 Simple summary This post proposes that the “pennying” technique utilized by multiple solvers is banned. “Pennying” is a technique employed by solvers in order to increase their chance of winning an auction, that involves mild manipulation of prices, effectively converting part of the COW rewards per batch into additional surplus for the users. Motiva…

https://snapshot.org/#/cow.eth/proposal/0x812273c78abe1cea303d8381e1fb901a4cb701715fd24f4b769d0a0b3779b3e2