John Rambrandt
I’m a computer engineer who spends my time building for the Web and contributing to open source, but I’ve always been obsessed with how things break. I treat cybersecurity as a puzzle that involves both code and people, blending technical defense with a deep dive into the psychology of social engineering. My goal is simple: build tools that are open, scalable, and actually resilient against real-world threats.
Written by John Rambrandt (24 articles)
The GA4 conversion in Google Ads fired on a /thank-you/ page that returned 200 to curl
If your conversion fires on a URL that returns 200 to anyone, your conversion count is inflated and smart bidding is optimising to it. A thirty-second test, what we...
Google Ads counted three conversion actions on one lead. Target CPA optimised to the sum
One good lead registered three times. Smart bidding optimised to the inflated count. And the API field that says a conversion action isn't counted turned out to be...
Google Ads Ad Strength 'Excellent' converted at 1.3% vs 3.8% for 'Good' across $75k
In one account, ads rated Excellent converted at a third the rate of ads rated Good, and Poor ads had the best click-through rate. Ad Strength is a diversity score,...
Meta is selling organic reach for a flat fee.
For fifteen years, agencies sold clients a dream: "earned media" on someone else's property. We called it organic social and treated it as the free layer, the place...
Ask.com is dead
Fit Test Australia - The Truth
The truth about Fit Test Australia's unfounded allegations, defamatory reviews, and attempted extortion against Mojo Dojo. We present the facts and evidence.