Newbie advertising campaigns (Help me please with advice)))

[IgorSia]

Hi everyone! I'm a newbie.
Immediately I apologize for my english.
I will be grateful to everyone who will help me with advice and share experience.

Advertising network: PopAds, Clickadu(popunder)
Affiliate network: ImonetizeIT
Budget: 150-200$
Tracker: AdsBridge
Payout: 0.2 - 0.32$ BR
0.2 - 0.56$ PE


I decided to launch 1-2 advertising campaigns, for this I ran a split test in vertical dating (I used smartlink). At first, I launched only in the Popads ad network, according to the results of the split test, I left only two countries in operation, this is Brazil and Peru, there were also conversions in Ecuador, but I decided not to work with this country.
Final statistics at the moment 03.08.21

I set maximum targeting (All devices and all cities) in the adult category.

I chose Legacy bid 0.0002 to start with.

First of all, after a little traffic test, I turned off the non-converting OS

I turned off everything that wasted 1 conversion costs and did not bring any conversions.

Then I turned off the regions.

The exception was Sao Paulo, as the ROI began to drop to -80%