I just published a full walkthrough on launching your *first* Meta Ads campaigns for subscription-based mobile apps (Installs → Trial → Purchase).
https://t.co/4tdleBUACa
Eric Seufert's "Retire the LTV metric" had one idea that changed how I price UA:
One metric: ROAS.
Two knobs: the horizon (Dx) and the bar (%).
Most teams don't challenge this enough. Someone set "150% ROAS at D30" two years ago and nobody questions it.