system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What exactly am I paying domain registrars for? 

If they don't do hosting and there is no way they have rights to every domain before it's purchased, what service are they providing and is it one that somebody could do without them?
gpt
There are some administrative that need to be paid for (staff, office costs, hosting their own website).

But mainly there needs to be some fee involved otherwise there's nothing stopping people from registering millions of domains, just for fun.