Android networks suitable for blackhat - what is that?
Many ad networks will ban you if you use blackhat or greyhat techniques for big CTR or displaying ads outside application. Few networks will not do it:
Airpush - ad network with smartwall (intersititial) and weekly payment (from $600/week) and net30
Startapp - net30, native ads, intersititial
Appnext - net30, intersitital and API for native ads
These networks can be used for any purpose, nobody care.