I think the answer might depend on your ISP and where you are based in the world In the EU/aligned countries, selling your data and injecting shit into DNS is

I think the answer might depend on your ISP and where you are based in the world In the EU/aligned countries, selling your data and injecting shit into DNS is very much a frowned on thing. More over, as there is competition, you can migrate away to some other ISP that isn't shit. I currently use my ISP's DNS as an upstream, as they are reliably, fast and not shit. I'm temtped by adding a pi-hole. But I've not fully tested it yet, and I'm reluctant to migrate away from pfsense's DNS, as I have lots of local hosts that need resolving.