Stats/Rankings/The Quadrilateral
The Quadrilateral
by Geoff Shackelford
A year-round newsletter from one of golf’s last independent voices devoted to all things Grand Slam and the best Cup events.
Free subscribers
~17k
Est. revenue
$59k – $120k / yr
Last 30 days
Mostly flat
Public estimates are rounded ranges, not exact figures. Paid plans include precise metrics, history charts, sponsor intel, and exports. Last updated Jul 27, 2026.
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