Hi,
I just promote offers by push traffic, I try propellerads.com and pushground.com.
The first day, the roi is very good, but it was horrible, there was no lead the next day.
so I creat white zone campaign, but no lead also.
My question is
1. if the white zone is not useful on push which is good for pop traffic.
how to use white zone?
2. how to get more leads with good roi for a few days?
Hi!
We recommend using the blacklisting strategy as if you use whitelists, users may see the same ads for a long time.
To get more leads you can:
• use emoji in creatives;
• use macros of geolocations in the headlines of creatives;
• target only new audience;
• update creatives regularly.
@fuyuzhelianmeng
Before I start speculating about your issue I have a question.
You say "The first day, the roi is very good", about how many conversions are we talking there?
20 leads the first day
>1000 click
Please be more detailed with the stats/info... we would love to help you out, but we need more info. If you post it all at once, you won't have to wait for us to ask more questions 
1000 clicks and 20 leads isn't a lot, but it's not a "Random" bunch of conversions either... but that still depends on what you were promoting. Were this proper SOI/DOI leads, or were you using some push subscription offer (as recommended in the $1 guide)?
Was this just one campaign in one GEO? Or several campaigns across multiple GEOs?
How high did you bid? Did you make any changes when the conversions stopped?
It's normal for fresh campaigns to perform better, as the algo throws a burst of impressions at your ads, to asses what the CTR is going to be. These initial clicks usually convert better, so a decline usually follows, especially in case of ads that do not reach high-enough CTRs.