^ this I still have questions about shit but I don't even bother asking them because the first response/questions is . . . have you tested it? the answer is always no. So i ask myself would this work and now I just test it. I spent a few grand (yes I am a slow learner) before I hit any sort of profit but on my first profitable campaign I recovered all of my loses and earned a nice profit as well. I still haven't had another big campaign but I have one that makes enough for me to not run anymore debt to test more more more more mroe more more moar moar moarmoar until I make it a full time gig.
troof
it's not like you'll ever get a insightful comment on your question either, though.
Comes down to honestly just trying enough stuff out. Something is bound to work for you at sometime