2 ms·
When user agent clicks the ad, that's how the ad companies know it's real.
by zelly 7y ago
When user agent clicks the ad, that's how the ad companies know it's real.
- ignoramous 7y agoNot that easy, see: https://news.ycombinator.com/item?id=8569409 https://news.ycombinator.com/item?id=8569409