Hi wearebrainstormmedia,
Thanks for reaching out.
I found your GAM ad units in your articles and sidebar, as well as the connected header tags. I can confirm the ads appear while browsing your page from the USA and Brazil, but not from Germany, Spain, or UK.
As far as I can see, this effects ads placed using Advanced Ads and also manual ads in text widgets.
I am uncertain if this is caused by privacy or geotargeting features from GAM though, but suggest looking in your settings related to these options.
The GAM browser console might help here getting further information about the behavior.
On your front page is also the following console error visible in the browser development tools:
[GPT] Div ID passed to googletag.display() does not match any defined slots: div-gpt-ad-1519305183535-0.
This not matching slot should not be related to the first issue, but also worth looking into.
Best regards,
Henning