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.
