Low CPC traffic source for CPA?

Hey, I'm thinking about Bing Ads or AdWords and maybe FB Ads too for promoting CPAGrip or OGads offers.

Which is more stable and a bit cheap?

And is there anything I need to be careful while setting ads so that I don't face any issue like ban or something?

Thanks in advance!

i think you should use popads or native ads. but bing will work too if you don't plan to promote email submit offers