Yes, 100 % plan from day one or you’ll regret it big time. We launched in CIS only, then decided to go India + Brazil + Indonesia in one go. The old platform we were on laughed and said “sure, just give us 9-12 months”. Instead we built our own best supply-side platform software with a team that already knew all the global-scale pitfalls used these guys, delivered in under 3 months: https://geomotiv.com/industries/adtech/ssp/. Multi-region from the start, separate clusters per continent, auto-failover, local consent handling baked in. Went live in all three markets simultaneously, latency stayed under 40 ms everywhere, revenue tripled in four months. Zero drama, just growth.