Congratulations, you've just sent all of your legitimate DNS traffic to a tracker (the thing pi-hole is usually deployed to avoid).
Remember that when a service is free, you are usually paying with your data.
Remember that when a service is free, you are usually paying with your data.
> Unlike most DNS resolvers, 1.1.1.1 does not sell user data to advertisers.
Putting aside the question of whether they actually honour that commitment, has your ISP even published a similar statement to put their reputation on the line?
I think Cloudflare's commitment is plausible. They have a financial incentive to maintain their free DNS resolver's reputation and popularity, because they are selling points for their commercial authoritative DNS service; https://www.cloudflare.com/en-gb/dns/. Does your ISP have a similar financial incentive to behave?
"If it's free, you are the product" is not always true. Sometimes, if it's free, you are the marketing funnel.