Example: Marketplace (Jiji)

A classifieds marketplace like Jiji connects buyers and sellers: people sign up, browse, contact a seller, then complete their first transaction — and the best users transact again and again. The Marketplace model captures this two-sided, high-frequency journey, and it unlocks every opportunity kind the autopilot offers.

1. Events to instrument

Emit these from your marketplace backend, keyed by the user's external_id. (This example engages the buyer side; you can run a second workspace or contact set for sellers.)

Your event            Fires when…                       Useful properties
-------------------   -------------------------------   -------------------------
account_created       a user signs up                   signup_source, category
seller_contacted      a buyer messages a seller         listing_id, category
                      about a listing
first_transaction     they complete their first deal    listing_id, amount
transaction           any completed deal (incl. first)  listing_id, amount, category

curl https://api.engageapp.xyz/api/v1/public/events \
  -H "X-API-Key: df_your_secret_key" \
  -H "Content-Type: application/json" \
  -d '{
    "events": [
      { "external_id": "user_3390", "event_name": "seller_contacted",
        "properties": { "listing_id": "L-99213", "category": "electronics" } }
    ]
  }'

2. Choose the model & map events

Pick Marketplace and map:

Canonical behavior   Role          Your event          Required?
------------------   -----------   -----------------   ---------
signed_up            acquisition   account_created     required
first_transaction    conversion    first_transaction   required
transacted           activity      transaction         required
contacted_seller     intent        seller_contacted    optional (unlocks abandon)

Transaction count tiers up active traders and power users automatically.

3. Resulting lifecycle stages

Users are classified as visitor → buyer → active trader → power user → lapsing → churned. Three transactions make an active trader; ten make a power user, while recently active.

4. Opportunities & campaigns

• Onboarding stall — signed up but never transacted. Campaign: trending listings in their category and a "how it works" nudge.
• Abandon — contacted a seller recently but didn't transact. Campaign: "still interested?" with the listing and similar options.
• Post-conversion — just completed their first deal. Campaign: rate-your-experience plus recommendations for the next purchase.
• Re-engage dormant — traded before, now quiet. Campaign: fresh listings in categories they've browsed.
• High-value nurture — power users (10+ transactions). Campaign: seller tools, priority support, or category perks.
• Win back — lapsed traders. Campaign: what's new in the marketplace and a reason to return.

Because it maps every role except churn, the marketplace model runs the full opportunity catalog.

5. Channels, autonomy & real-time

Connect push and email for listing-driven nudges; WhatsApp works well for high-intent follow-ups. Start in review required. Both seller_contacted (intent) and first_transaction (conversion) trigger real-time detection, so a stalled high-intent buyer is followed up quickly.

Next steps

• Start from the general integration guide.
• Selling your own inventory instead of hosting sellers? See the e-commerce example.