Yes. Enable combinations in your campaign settings and they'll work together.

Yes. If you select multiple variants, a popup lets them choose. Single variant? It's added automatically.

The promo stops automatically and you'll see a warning in the dashboard. No broken customer experiences.

Yes. The free plan includes every feature and 50 gift additions per week, across all your campaigns. The allowance resets every Monday. Upgrade to unlimited gifts for $19/month when you outgrow it.