Multivariate Testing Text / Display Ad Optimization Consolidates Reporting Ad Revenue Payment Cost
Rubicon Project Ad Network Optimization Text and Display
yes
Consolidated and paid in one check through Rubicon. Free Solution - Features are Limited.

30 day trial for Full Feature. After that Rubicon takes 10% of Ad Revenue.
YieldBuild Ad Network + Ad Format + Ad Location Optimization Text Only
yes
Paid through original Ad Networks 30 day Free Trial. After that YieldBuild takes 3% of Ad Revenue.
PubMatic Ad Network + Ad Format Optimization Text and Display
yes
Paid through original Ad Networks Free (while still in Beta)
visit:Comparison Of Ad Optimization Solutions For Publishers