I know how important it is to make sure I give landers enough time to get some data. So I wanted some feedback from some more experienced PPV marketers.
Here are my current stats:
Attachment 7605
Should I be pausing some of those landers yet? Or let them run for a while longer?
Also, how long do you allow targets to run before deciding to cut?
Thanks...
As I'm sure you've heard before - there are no hard and fast rules as to when to cull landers and targets anywhere in affiliate marketing.
In an ideal world you would want to test each lander on each placement until your stats reach statistical significance. However this is never going to be economically viable for you.
Rules of thumb here are what you want to work off. Mine are generally spending around 10-15x the payout for the lander, 2-3x the payout for each placement.
Vortex created a couple of good guides which should give you some guidance here....
Part 1: http://stmforum.com/forum/showthread...Banners-Part-1
Part 2: http://stmforum.com/forum/showthread...Banners-Part-2
The great Ruby has mentioned my posts! 
@krishna: You can only cut landers based on conversions, not clicks. There are landers that have low CTRs but good CR that will make profits for you. Since none of those landers have made conversions, you can't really cut any of them yet. When you DO get conversions, you can use the split-test calculator to cut under-performing landers.
As for targets - you can use that spreadsheet calculator to cut bad ones, but I wouldn't recommend using that yet if you don't even have good landers. Right now you need enough traffic to test your landers, so Ruby's rule of thumb of cutting a placement based on 2-3x the payout will do just great. For now, you'd want to cut placements that are draining your budget, such that you can test landers/offers as cheaply as possible. Once you have good landers and a good offer, you can use that spreadsheet calculator to cut placements that are below a certain ROI. Right now you can't really conclude a placement is "bad" or not, because you're not testing with good landers.
Keep testing more landers - try really different ones that look and work completely different. Try different ad text / angles. Test CR-boosting elements like entry-pop, exit-pop, backbutton, vibrate, audio, etc. It would also be good to test multiple offers in the same vertical and geo to find the best one.
Once you have a lander + offer combination that's doing positive ROI, you can use that spreadsheet calculator to cut all placements that don't meet the ROI you set.
Hope we've clarified things for you!
Amy