Hi,
I just got started on mobile and launched my first offer on Go2Mobi. I used direct linking and I am seeing pretty good conversions and an ROI of -70% before any optimization.
The problem now is that I am trying to optimize my campaign by Blacklisting placements that spent 3X CPA Goal without conversion.
I can't seem to get the placement blacklisted when I click the "Blacklist" button.

Anyone has any idea how to blacklist these placements?
Hi,
Got this problem too.
You have to check the Campaigns in the reports, only then will the platform know which campaign you want to blacklist for.
Hope that helps 
Being unable to blacklist is generally the result of not including the campaign name in the report. As johndeng as mentioned, be sure to include the Campign Name drill down option and you will be able to optimize to your hearts content.
ROI of -70%
just a quick question from newbie here you mentioned ROI of -70% is that minus 70%