I kind of ignored all Internet advertising (adblock plus makes it fairly infrequent, the only exception being on mobile, which I'm working on fixing myself...),

I kind of ignored all Internet advertising (adblock plus makes it fairly infrequent, the only exception being on mobile, which I'm working on fixing myself...), but I've been seeing how effective retargeting is firsthand -- the "Tile" bt4.0le tracker tags have retargeted me ~everywhere, and it eventually was enough to make me purchase. I was curious how one would do this kind of thing as a startup, and this customer case study is really informative. I was assuming it would be a several thousand dollar minimum investment, but it's on the order of an adsense trial, so a lot more approachable.