{
  "title": "ATT opted-in rows versus modelled rows: keep them in separate columns",
  "synthetic": true,
  "inputs": {
    "spend": 10000,
    "optin": 4000,
    "modeled": 9000
  },
  "outputs": [
    {
      "label": "Opted-in ROAS",
      "javascript": "v.optin/v.spend",
      "expected": 0.4
    },
    {
      "label": "Modelled ROAS",
      "javascript": "v.modeled/v.spend",
      "expected": 0.9
    },
    {
      "label": "Naive blended ROAS",
      "javascript": "(v.optin+v.modeled)/v.spend",
      "expected": 1.3
    }
  ],
  "constraints": [],
  "limits": "Apple’s ATT documentation describes authorisation status, not a ROAS formula. Modelled totals are vendor-specific."
}