I tested several proven offers with skro and my custom domain, the clickloss is huge, and ROI is -86%
propellerads:
skro:
gg:
skro/propellerads = 8862/14439.0 = -38% clickloss
gg/skro = 7500/8862.0 = -15% clickloss
gg/propellerads = 7500/14439.0 = -48% clickloss
I changed to another...