Having container space limit but no max. number of containers seems to be a contradiction in an effort to save and optimally allocate storage resources.
Would it not be far more manageable if the number of containers per account had a fixed limit, or total storage per account was fixed.
Say, 2 containers max but with 500MB instead 128?
Or 1GB max per account that can then be user-allocated over one or more containers?
Charge for extra.