If money is an issue, perhaps docker should make container authors host their own stuff and just make them searchable/discoverable in dockerhub.
You aware that hosting probably represent 1% of Docker spending at the moment ?
You aware that Docker has 100+ employees based in SF where the average salary is 120K$/Year ?
And here I'm being gentle not to include the management[0] which in general has salary closer to 300K than 120K