You said you work for adtech, I'd just like to comment that I personally like targetted ads. Areas of my life have improved from targetted ads, I'm shown things I didn't even know I want until I've seen them, etc. I look at it as a positive.
Its an interesting one. I've made some pretty active choices about jobs for ethical reasons but ended up in a slight geographical bind in my last search. I found my current company through a friend (who works in another department) and was very skeptical. After not finding anything bad I decided to go with it for a few months, but had a resignation letter ready in my car. I'm now over a year in and despite the normal problems businesses have there is not a moral one here - and I've had pretty great insight into the decision making.