Cloud hosted Pi-hole is also free. You pay for the hosting. With the cloud hosting you also get a fixed ip address which you can use from all the places, while

Cloud hosted Pi-hole is also free. You pay for the hosting. With the cloud hosting you also get a fixed ip address which you can use from all the places, while most people have dynamic ip addresses at home (which you need to track and change in all devices). Furthermore initial cost of a pi and accessories are equal to 10-20 months of hosting.