They were. I think it was 1995 they started charging? I had dozens of domains. There was a simple text file form you had to type over. Then they started charging $200/2yr for .com/.net/.org and a lot of us let our domains go which ended up being worth tens of millions a few years later during the boom.

(the story at the time of what killed the "free" is that Unilever mailed in 19,000 forms; one for each of their registered trademarks)