Dynamic wall

We built our own dynamic wall (modal and paywall) with a custom algorithm, but changes are difficult. Features should include newsletter invitations, profile completion prompts, payment and churn alerts, metering, and paywalls. Options should allow A/B/C testing, prioritization, discardability, design variations (toast, modal, catfish, half-screen), and targeting rules (e.g., by subscription status, country, metadata, or renewal state).