Honestly though 5 dollars a month isn't bad if you don't want to deal with hosting yourself.
> These limitations include but are not limited to [...] pull rate (defined as the number of requests per hour to download data from an account on Docker Hub) [...]
I read that as per account that owns the repository.
[0]: https://www.docker.com/legal/docker-terms-service
Honestly though 5 dollars a month isn't bad if you don't want to deal with hosting yourself.