We know that the AcoustID servers can end up overwhelmed if someone submits a large number of fingerprints in one load, you can often see these peaks on the Grafana dashboard (https://acoustid.grafana.net/public-dashboards/1249b428418a494daf09e38d6f331d92?from=now-90d&to=now&timezone=browser) certainly on the Submissions card

Of course not all of this data comes from Picard, but I don't think there is a limit to the number of submissions that Picard can send.

My improvement is that a warning should be displayed if someone is trying to submit more than 1,000 fingerprints?

Anything to try and ease the strain on the servers