Scores include a gravitas multiplier that prevents very young or very small channels from
dominating the rankings on short-burst metrics alone. The multiplier combines a subscriber factor
(log₁₀(subs) / log₁₀(100K)) and an age factor (min(years / 3, 1)).
Channels with 100K+ subscribers and 3+ years of history receive full credit;
newer or smaller channels see their score bonus scaled down proportionally.
See Methodology for details.