Interesting reading this.
Been a #1 vendor for 3 years now (sig is my prod) and was a successful aff before turning vendor. There really isn't such thing as picking a good product. It's more avoiding the shit than picking a winner. Anyone with even a few months experience in this game should be able to mine their marketplace and third party analytics sites and filter their winners easily.
I'm surprised more people here don't fux with clickbank the way they do with CPA - some of the niches/produts don't have a cap, market is there, a lot of the rules that apply to cpa offers don't at CB (URL rules, brand rules, lead/traffic rules etc.). I've scaled and plateau'd and re-scaled a ton of times based on both high gravity and low gravity proudcts. It still comes down to your skills and talents and how you market vs "if you promote x you'll do well".
Gravity :: Bit of a bitch to explain but in short.
My first affiliate just got a sale = I get 1 gravity point. Now over 8 weeks that shrinks to .09, .08.... down to 0.0.
If in two weeks he gets another sale - his point for me goes back to 1.0. So he can make 100 sales a day but I only get 1 gravity point.
Say I have 10 affiliates, always fluctuating in how many sales they have made in the last 8 weeks, my gravity will not be 10, it will be 5-8 more than likely as some aff's are better than others. Scale that to 100 aff's, and same shit - you'll probably have 50-80 gravity considering some are doing daily sales and others only convert once and everything in between.
Conclusion :: There is no way to tell how many units/volume/profit can be made or is being made based on gravity (also never believe CB vendors EPC's - they differ greatly per aff/source) - however it's still a good loose gage to see what's what. More important than gravity though is the products history and charting. Don't just look at any one moment in time - if the product is dying or on a big downward slope in grav it's not a good sign. Alternatively if the product is new, has a gravity of 19, and the slop is going up in the charts you have a good opportunity to position yourself well before the masses come. This doesn't apply to MMO shit because it's an incestual buy where CB'ers are buying the MMO using their own links and inflating the gravity quickly falsely (followed by a 'drop like a rock' in grav that you see repeat after every mmo launch).
Definitely stay away from the MMO shit if you're new, and definitely strive to champion 5-10 profitable campaigns to understand the eco-system enough to launch your own shit. Launch stuff as often as you can until you find your big winner to scale on and boom your life changes fast.
Making some spike money on CB isn't that hard, however like in any niche/network it's the consistency that's a bitch so if you can launch anything that stands the test of time and remains the leader among all vendors in that niche - you win big at CB I wouldn't discredit it or brush the whole thing with the MMO crew, it's just a processor with aff tech and a SHITLOAD of misguided aff's to recruit and convert to make you money.
NC.