Founder here, let me know if you have any questions! Upvotes would naturally be greatly appreciated to get the word out in the US :-) Right now we mostly have large (and small) hosting providers in the EU as customers.
We run scheduled scans and very soon we'll be hooking into Apache, FTP, etc. But Patchman is actually preventing malware from being uploaded in the first place by fixing vulnerabilities before they get exploited.
Also, most malware is not executed right after uploading. They usually wait for the weekends.