Maven Central publishing limits

Maven Central is introducing publishing usage visibility and limits for high-volume publishing activity. These changes are focused on publishing patterns that operate at commercial or infrastructure scale: unusually large artifacts, high file counts, very high release frequency, or repeated high-volume publishing across an organization's namespaces.
...
In the past 90 days, 10% of namespaces accounted for:

• more than 88% of all files published to Maven Central
• more than 90% of total storage consumed by new releases
• over 70% of all new release events

However, the new monthly limits are quite stringent:

• 15MiB (release size)
• 300 files
• 3 releases