That's not what they said though, near as I can tell. Here's the post where they talked about how they were giving out beta invites from back in April: https://worldofwarcraft.com/en-us/ne...veloper-update
Whereas the first batch of invites were meant to "mainly go out to long-time WoW players with active accounts in good standing, as well as Blizzard friends and family, along with a limited number of content creators and journalists", that was the first wave. They go on to reference that as they "engage in focused PvP and raid testing, we’ll also do some targeted invite waves that prioritize players with extensive experience or expertise in those parts of the game." That to me at least says if you weren't lucky enough to get in on the first batch of invites, that your chances of getting an invite will instead be focused on your experience with PvP and raiding.
Perhaps they'll get some long-time WoW player invites in here before the raid opens for testing, but to me it sounds like they are very specifically targeting who gets in and who doesn't this time.