Practically it would just mean they send an email to the priority support list before they send it to the listserv Mail servers are fast enough these days that

Practically it would just mean they send an email to the priority support list before they send it to the listserv Mail servers are fast enough these days that I don't think that it really matters what order the emails go out in. Maybe someone would want to pay to get a phone call when an advisory goes out, though. I have no objection to providing support for paying customers, e.g., to help them figure out if they're affected by a bug. But money should not result in you hearing about a bug any earlier.