And even if marketers do start customizing images, hasn't Google gotten pretty good at comparing very similar files?
For image tracking pixels, I'd just start returning PNGs of random dimensions with completely random pixel data. Ta-da, unique images that aren't similar at all (unless they wanna start doing wavelet transforms or something).
For image tracking pixels, I'd just start returning PNGs of random dimensions with completely random pixel data. Ta-da, unique images that aren't similar at all (unless they wanna start doing wavelet transforms or something).