I've been thinking about this a bit the last couple of days and would like to know how you profitable guys view this.
Did you find there was a "tipping point" where your profitabilty really took off? I mean when starting out it's obviously a struggle just to find your first profitable campaign but say you get your first one in the black pulling ~$20/day yet you are still testing say 2 to 3 new campaigns a day at $15 spend and given that a lot of campaigns may only have a short lifespan......what sort of win/loss ratio do you have/need for campaigns and how many campaigns do you need to build a day to keep growing?
In my experience there has never been a tipping point for me.
I still test today just as much as I did 2 years ago.
how much do most people test on avg? 2 campaigns a day? more? less?
I think you're over thinking it.
Looks like you only tested 6 campaigns... you definately need much more before you have a chance of finding a winner.
My definition of campaign is anytime there is a big variable you're testing whether its a new traffic source, new angle, new targets, etc.
I reccomend 5 to 10 camps a day for week and if you can't find something that has potential you're doing it wrong.
Day 1 - Offer A Vs Offer B
Day 2 - Winner of Day 1 Vs Offer C
Day 3 - Winner of Day 2 Vs Offer D
Keep testing and you will find a winner in a week or less.
From my experience 5%-6% of campaigns I run are in the green , and that doesn't mean banking.
That means they make more than I spend.
Only 1% or less really bank and recover the costs of all the weird stuff I test 
time to break out some stats, metrics, risk/reward evaluation and money management to create some formulas and benchmarks.
this is very similar to what we do in options trading or any speculative endeavor.
we need more data though!
I have a 1-3% are banking campaigns.
5%-10% are BE (break even)
rest losers @ $10/$100 a test campaign (varies whether CPV or FB)
Lucrumnet