They have a predatory business model. “Hey we’re cheaper than the competition”. Once you’re soaking in it and need features, they have options but it’ll cost you. I reckon they have slick sales people who know how to pander to the egos of middle management as well. You know … The people who don’t actually have to use the tool but sure like to feel like they somehow matter.
Or a variation of this is TailScale configured to use NextDNS and a TS exit node. That’s for anyone who doesn’t want to maintain a PiHole. I’ve done both. Personal choice.