Most of the OSS projects I use seem to either have moved to the GitHub container registry or some other (smaller) equivalent. Some have even set up their own registries behind Cloudflare.
One of the first things I did was move to Quay.io which is unlimited everything for OSS projects. I was reaching a point where I had 1M+ pulls a month (I suspect some kind of DDoS, accidental or otherwise, for a project with just 1.7k stars) - and not having to even think about the bandwidth or anything was wonderful. It's nice to be supported by Red Hat which I generally consider more benevolent towards OSS as opposed to Docker Hub.