In the replies to the reddit thread, I'm seeing a lot of people they tell me they moved to Control D. Some people had complaints about latency of the service and other factors, as it seems Control D doesn't have very extensive worldwide coverage.
But, it definitely seems to be the superior option. It's $40 a year more for the full plan, which is unfortunate, but if they offer more options, better customer support and etc it is probably worth it. NextDNS is $20 and standard Control D is the same price. NextDNS does work, but there is seemingly no support whatsoever.
I came across a Stacksocial coupon that offers $40/yr for the standard plan, so I'm tempted between the two options. The standard option doesn't offer changing location via DNS. That may not be important if you're already using a DNS, but it would be nice to have.
I bought a RPi5 with the intention of turning it into a PiHole but never got around to it, and I don't believe you can use your PiHole's DNS outside of your LAN (for example, if you use it on your mobile device and leave your local wifi, it can't connect to it's local IP).