Sponsorships

npx startup-builder add play sponsorships   # 1 · writes plays/sponsorships.mdx (Not live yet, gaps #5)

# 2 · dry run; below, its 422 on 2026-05-25
curl -X POST "https://api.sb/leaseline.app/campaigns?mode=try" \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"play":"sponsorships"}'

# 3 · keep it; every booking waits for your approval
curl -X POST https://api.sb/leaseline.app/campaigns \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"play":"sponsorships"}'

# on
curl -X PATCH https://api.sb/leaseline.app/campaigns/sponsorships \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"endsAt":null}'

# off: no inquiry or booking; booked placements still run
curl -X PATCH https://api.sb/leaseline.app/campaigns/sponsorships \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"endsAt":"now"}'

{
  "$id": "https://api.sb/leaseline.app/events/event_1308",
  "$type": "Event",
  "name": "Slot.opened",
  "at": "2026-10-19T11:05:37Z",
  "seq": 1308,
  "data": {
    "publisher": "publisher_6",
    "kind": "newsletter",
    "subscribers": 9400,
    "runsOn": "2026-11-04",
    "price": 450,
    "evidence": "B"
  }
}

npx startup-builder trigger Slot.opened --like event_1308   # replays the slot
npx startup-builder clock advance --by 4d   # runs the inquiry’s one follow-up, which ends when they answer
npx startup-builder listen Slot.opened --forward-to http://localhost:3000/hook

You hold the Marketing Lead Key Result: 20 incremental ICP visits per $100, payback 1.0, by 2026-12-31. ← worker, metric
Propose one coded placement at a time, within $1,000 a month; Dana approves every booking. ← your file, line 4; Spend Limit
No booking over $300 on grade C audience evidence.                               ← Evidence floor
Rebook only at a coded 60-day payback of 1.0 or more; one retest between 0.5 and 1.0. ← your file, line 5; Payback gate, Retest limit
A host read says only what your approved pages say, with the sponsor label.      ← Proof hold

[
  {
    "$id": "https://api.sb/leaseline.app/tasks/task_557",
    "$type": "Task",
    "assignee": "worker_1",
    "due": "2026-10-20T17:00:00Z",
    "on": "publisher_6",
    "brief": {
      "who": "a regional landlord association newsletter, 9,400 subscribers",
      "chose": "book-the-slot",
      "why": "named by your signups 6 times; grade B evidence",
      "slot": "Nov 4, $450, sponsor block above the fold",
      "code": "tested end to end",
      "never": [
        "a claim outside your approved pages",
        "a booking past $1,000 this month"
      ]
    }
  },
  {
    "$id": "https://api.sb/leaseline.app/approvals/approval_61",
    "$type": "Approval",
    "verdict": null,
    "deadline": "2026-10-21T17:00:00Z",
    "draft": "Booking: Nov 4 sponsor block, $450, code LL-NOV4",
    "route": "book-the-slot",
    "checks": [
      {
        "check": "evidence",
        "status": "pass"
      },
      {
        "check": "concentration",
        "status": "pass"
      },
      {
        "check": "code-test",
        "status": "pass"
      }
    ]
  }
]

[
  {
    "reason": {
      "limit": "payback",
      "observed": "0 coded payments in 60 days on $300",
      "bound": "0.5",
      "window": "60d"
    },
    "doc": "/plays/sponsorships#stop-payback",
    "task": "task_472"
  }
]

{
  "$id": "https://api.sb/leaseline.app/campaigns/sponsorships",
  "$type": "Campaign",
  "play": "play:sponsorships@1",
  "path": [
    "placement-icp-visits-per-100",
    "icp-reached",
    "new-arr",
    "net-new-arr",
    "arr"
  ],
  "experiment": {
    "metric": "placement-icp-visits-per-100",
    "unit": "per-100-usd",
    "heldBack": 0,
    "decision": null
  },
  "readout": {
    "value": null,
    "n": 4,
    "maturing": 1,
    "interval": null,
    "readability": "inadmissible",
    "basis": "before-after",
    "pooled": true
  },
  "ledger": {
    "spend": 1350,
    "workerCost": 2,
    "hours": 2.6,
    "pipelineArr": 347,
    "wonArr": 4379,
    "projectedArr": 687,
    "paybackDays": 41
  }
}

- Leaseline cuts late renewals in half for property managers.
+ Leaseline sends every renewal notice 60 days out, per owner, for $29 a month. Sponsored.

---
holdout: 0        # each placement reads on its own code; it reads before-after
---
Propose one coded placement at a time, up to $1,000 a month. I approve every booking.
Rebook at a coded 60-day payback of 1.0 or more; retest once between 0.5 and 1.0.

$ npx startup-builder show plays/sponsorships
holdout 0 · Limit $1,000 a month · payback target 1.0     your file  plays/sponsorships.mdx:2,4,5 (Ask 2026-05-25)
family demand · worker role:marketing-lead, owns never · chooses 6 (3 rule, 3 read) · sequences publisher-inquiry, hackathon-builder-follow-up, event-conversation-follow-up · checks owned-by-a-person, evidence, borrowed-first, concentration, code-test, proof · stops 8 · placements portfolio-network, gmail, outlook, yahoo-mail, youtube, github    catalog  play:sponsorships@1 (Not live yet, gaps #5)