Every paid dollar adds one point. Each top-up begins softening by 1% after its first complete 24 hours, so no position is permanent.
The rule
Payments are recorded in cents and scores in fixed micro-points, avoiding floating-point money errors.
New points do not reset the age of older points. That prevents a tiny top-up from protecting an old balance.
Partial days do not decay. After each complete 24-hour period, that credit is worth 99% of the previous day.
When scores match, the sponsor that reached the score earlier stays ahead—even if a later bid or decay creates the tie.
Ranked entries are always labelled Sponsored. Verification and service quality are separate from placement.
Published formula
total = Σ(top-up × 0.99 ^ floor(age ÷ 24h))