Around 2 years ago in S3 there was an interesting quote issue - official documentation stated quotas per S3 prefix (kind of like folder path), but in practice it turned out only first 20+ characters of a prefix were taken into account for quotas, so our burst computations loading thousands of objects were mostly timing out. We had to add random prefixes at the beginning just to get around that. AWS updated their quota management to per-full-prefix, finally though.