The model for most the content on the internet doesn’t work without advertising. The people who are “zero tolerance” on ads are going to prevent possible compromises from being made and just encourage an arms race. I don’t think we win that arms race, we get more insidious forms of tracking and brazen advertising.
I did this this year for wildfire smoke, and it works great. Having said that, it is not quiet and the way I was using it was to run it at full blast for an hour, then leave it off for most the day.
If you wanted an always-on solution, I think I’d actually suggest a commercial air purifier.