Bidding Support

Regardless of billing_event, if optimization_goal is APP_INSTALLS, we deliver your ads to people we predict have a higher chance of installing your app. We do not consider billing_event when we delivery ads. billing_event only impacts delivery through pacing if your budget is limited. Performance in either case is close, while you risk uneven delivery or a slightly higher cost per install due to variance in action predictions and actual actions.

See v2.4 Optimization Simplification.