Mei Lin Chua owns the numbers at Oracl8. Her background is in quantitative data work, and she is the reason the fee columns say what a trade actually costs rather than what the fee page advertises. She logs maker and taker tiers, deposit and withdrawal charges, and tracks each exchange's reserve attestations as they are published on-chain.
Mei Lin builds every fee figure from published schedules and live account checks, records the effective rate at the entry tier rather than the promotional low, and re-checks costs when a venue changes its structure. Reserve attestations are logged from the exchange's own on-chain publication and dated, so a review reflects the posture at time of writing, not a stale claim.