[throwaway7919]

I work in ad-tech too, so I'm not judging you. The donations you've made are awesome, and I can see you've clearly thought a lot about how to best direct your money. But I think you're missing a few downsides.

The digital marketing/analytics industry doesn't spend a lot of time thinking about how to secure all that data they're collecting, and data breaches are happening more and more frequently. A lot of this data is supposedly anonymized, but often can be tied back to identifying information.

I would consider Google to be an exception here, as they have some of the best security people in the world working for them. But they are just that: an exception. Don't forget that the industry that Google enables is a lot less ethical (and a lot less competent) than Google itself.

There are other downsides too (e.g. the impact of advertising on editorial integrity, and the ethics of using political ads to tip the scales in an election).