Summary
Switching the cull parameters from bottom 349 fragments by Raw Score to total voting points earned in Period, and adding back in the top-voted fragments discarded this period.
Rationale
When we implemented the cull during Genesis (BIP-4), we used Raw Score (called True Score in the proposal) as a metric to determine the bottom tier to remove.
The Raw score is calculated by the number of times a fragment has been selected vs. viewed:
raw score=(votes/views)*100
This has had the unintended consequence of some of the fragments with the highest conviction by VP, which get viewed more, getting lower scores than fairly obscure pieces that had a few positive views but never enough conviction to rise to the top. This has led to high-conviction pieces, including ones that had reached the leaderboard, getting culled in subsequent rounds.
This proposal would change the cull to be based on total VP acquired in a Period instead of raw score.
Given this is in response to already seeing some top fragments get culled, this BIP would retroactively apply the new standard so that the top-voted fragments in the discards from Fragmentation will be added back into the voting pool.
Advantages
- Fragments that get conviction (by VP) in a round will be unlikely to get culled and have a chance to re-emerge in later rounds
- If live visibility of VP and rank is added, it will be possible for people with conviction for a fragment to save it from being culled
Proposal Specification
- Voting pool will be adjusted at the end of Round 6 on December 20
- The voting pool going into Round 7 will be reset to the top 700 fragments by VP, discarded or not, plus the 350 new fragments getting added in that round
- New ongoing cull will be the bottom 349* fragments based on total VP earned in a period
*reminder that the mint is also removed from the voting pool.
Budget
N/A, a half day of dev work.
Disadvantages
Imposed Lindy effect: Newer fragments will have a relatively tougher challenge to stay in the voting pool as fragments that have been around longer will accumulate VP over time.
