At 5-10k/day I’d skip most tiny networks unless you just want cheap testing. Go straight to in-app sources if your offer can handle it: AppLovin, Liftoff/Vungle, Moloco, Mintegral, maybe Digital Turbine. They’re not always easy with every vertical, but the traffic is way cleaner than random push/pop stuff.
Also ask for placement/app level reporting before you fund big. If they won’t give you any transparency, assume you’ll be burning budget while they “optimize”. Start with 1 geo + 1 or 2 angles, not 20 geos at once, otherwise you wont know what actually worked.