The best part for me is the flexibility it offers. PropellerAds provides good access to alternative traffic sources that are harder to get elsewhere, which helps with diversification. The self-serve tools and targeting options make campaign management more efficient. Review collected by and hosted on G2.com.
What I dislike most is that some campaigns can suddenly stop receiving traffic without clear notification. You also have to constantly monitor performance because certain zones deliver lower-quality or repetitive traffic. Competition in popular GEOs can drive costs up quickly if campaigns are not carefully optimized. Review collected by and hosted on G2.com.