testing networks for Kwai traffic, I've found that AdKaka and MyBid tend to perform better for Android-based traffic, with eCPMs around $0.80-$1.20, while PropellerAds and AdMaven do better with iOS traffic, yielding eCPMs of $1.50-$2.50. However, these results can vary greatly depending on the niche and quality of traffic, so it's essential to start with small test campaigns and monitor conversion and retention rates closely, as well as keep an eye out for suspicious traffic patterns that could indicate bot or fake traffic. I've also seen that optimizing ad formats, such as using push notifications with AdMaven, can increase eCPMs by up to 30% compared to standard display ads.