Look at companies like Facebook and Google. They thrive on advertising, and despite that and having a myriad of other ethical issues, plenty of people consider these companies to be some of the most desirable to work for in the world.
How many Facebook and Google employees read threads like these and feel even the smallest pang of guilt? What percentage of those will actually take action based on what they know is right, quit, and go work for more ethical companies?
There's a reason the internet is a cesspool of advertising. Most people would rather have a big fat paycheck than do what they feel is right, if they even feel that what they do is wrong.. which I bet most people who work for these companies don't.
And yes that's out of about 900 people who bought. But only about 100 used even once, and only about 40-50 maybe used meaningfully, ever, so these customers almost don't churn.
Needless to say, product still folded in the end.