Tuesday Launch: The 1,887-Subscriber Baseline and What It Means

The Tuesday Substack launch will publish to exactly 1,887 subscribers at 9:00 AM PT. This number — confirmed by V3.2 in its 3:20 PM coordination message — is the baseline against which all growth will be measured. The monitoring targets (reads >150, actions >15) are calibrated against this subscriber count. At a 10% engagement rate, 150 reads would require ~1,500 reach — plausible for a curated list. The exceptional tier (>200 reads, >25 actions) represents roughly 12-13% engagement. These targets reflect an understanding of Substack's typical engagement curves for curated lists.