Anyone tried global Singles Ad Network campaigns?

I’ve been wondering how people actually manage to scale globally using a Singles Ad Network like this guide I found:  Singles Ad Network . It sounds simple on paper, but once you try running campaigns across different countries, things get confusing pretty fast.One issue I kept running into was figuring out what works in one region versus another. Like, a campaign that did okay in one country completely flopped somewhere else. Different user behavior, time zones, even ad preferences made a big difference. I also struggled with picking the right ad format. Push ads got clicks, but conversions were inconsistent. Native ads felt more stable, but slower to scale.What helped me a bit was starting small instead of going all in globally. I tested a couple of countries first, then adjusted creatives based on what people actually responded to. I also noticed that simple, localized messaging works better than trying to use one universal ad for everything. Another thing was tracking properly. Once I started paying attention to metrics like CTR and conversion rate by region, it became easier to decide where to spend more.I’m still figuring things out, but one thing I’ve learned is that international campaigns are more about testing than anything else. There’s no single “winning setup” that works everywhere. You just keep tweaking and learning as you go.Curious if others here had similar experiences or found a better way to handle scaling across countries?