# Dryfit Scenario: Event-volume SaaS

> Analytics or observability SaaS priced by ingested volume. Source connections and custom events drive positive signals; stale sources are negatives.

*Source: [https://www.getbeton.ai/oss-tools/dryfit/scenarios/posthog-event-volume/](https://www.getbeton.ai/oss-tools/dryfit/scenarios/posthog-event-volume/)*

**Scenario kind:** posthog_event_volume
**Use-case kind:** ingest
**Value metric:** Events tracked, data points ingested, log lines
**Config file:** `configs/posthog_event_volume_mvp.yaml`
**Dataset id:** `posthog_event_volume_mvp_v1`

## Scale

- Accounts: 320
- Users per account (mean): 4
- Sessions per user (mean): 10
- Duration: 30 days

**Success event:** `custom_event_tracked` (account)

## Research metrics

- Ingestion volume trend
- Event-type diversity
- New-source activation rate

## Positive signals (ground truth)

- **source_to_custom_event** (count 75): `source_connected → $pageview → custom_event_tracked`
- **schema_then_custom_event** (count 40): `schema_changed → custom_event_tracked`

## Negative signals (ground truth)

- **source_pageview_only** (count 65): `source_connected → $pageview`
- **repeated_schema_changes** (count 30): `schema_changed → schema_changed`