Uh, paying for DNS isn't uncommon? Examples off the top of my head:
- Akamai DNS
- AWS Route 53
- Azure DNS
- Cloudflare (excluding personal/hobbyist plan)
- Google Cloud DNS
And many, many others. And I note the site you posted this comment on is using Route 53, so probably paid as I doubt their query volume would be in the free tier.
Paying for DNS for personal/hobby stuff is probably pretty uncommon, because like you say, most domain registrars will offer it for free. But commercial websites often will, particularly larger ones with serious traffic.
- Akamai DNS
- AWS Route 53
- Azure DNS
- Cloudflare (excluding personal/hobbyist plan)
- Google Cloud DNS
And many, many others. And I note the site you posted this comment on is using Route 53, so probably paid as I doubt their query volume would be in the free tier.
Paying for DNS for personal/hobby stuff is probably pretty uncommon, because like you say, most domain registrars will offer it for free. But commercial websites often will, particularly larger ones with serious traffic.