Bot crawlers are automated programs that visit websites for different reasons, like helping search engines keep listings up to date or checking that pages are working properly. Every public website receives this type of traffic- it's just part of being online. 

We’re currently seeing unusually high levels of automated (bot) traffic hitting the site at the same time, which is putting strain on the servers and causing some temporary 500 errors.

This isn’t a security breach — it’s a traffic load issue. We’re actively adjusting protections which is probably what you ran into in the Poser forum and monitoring things to stabilize performance.