I would suspect the point is rather that you have a bunch of megabyte range files, and you rarely update them and don't have to sync. But for most workflows this feature seems targeted at, the free tier seems insufficient.
I'm having trouble seeing where a 1GB/month quota in any way meshes with "large file" support. The free tier is basically "test out the API, don't even think about using it for real".
Yes, that is the free tier. If you want to use it seriously, it will cost some money. OR you can use it and host your own file server, for free.
I don't think these facts are a problem. They create an open source tool, provide a location to try it out, and a service to pay to use it if you like it and don't want to host yourself. Seems like a fair offer.
Does this mean that with the free tier I can upload a 1GB file which can be downloaded at most once a month? Even a small 10MB file, which fits comfortably in a git repo, could be downloaded only 100 times a month. Maybe they meant 1TB bandwidth?