Running 2.0.0.beta1. Not aware of anything looping, only I have access to these keys and the script that runs them is ran manually by me as I’m developing something to automate creating categories. I have 1 call to get the existing category lists, then one call per category creation (only 1 category right now). It has worked to create most of the categories before the rate limit got hit.
The ‘seconds’ varies; often 12, 17, 21, or other amount around that amount.