Well, I have far more than 10 TB and can still upload to the 750 GB per user limit every day. Can you double check the 'api ban' and give us more information? Google does not ban you, because you have 10 TB.
I have read here: New feature: CACHE - #4 by seuffert
That there some known issues like:
cache and crypt
One common scenario is to keep your data encrypted in the cloud provider using the crypt remote. crypt uses a similar technique to wrap around an existing remote and handles this translation in a seamless way.
There is an issue with wrapping the remotes in this order: cloud remote -> crypt -> cache
During testing, I experienced a lot of bans with the remotes in this order. I suspect it might be related to how crypt opens files on the cloud provider which makes it think we’re downloading the full file instead of small chunks. Organizing the remotes in this order yelds better results: cloud remote -> cache -> crypt
You can give cloud remote -> cache -> crypt a chance and tell us the outcome.