Beta testing

How does one get to be considered for beta-testing a PS Audio product? Like the upcoming Strata or such?

PS Audio makes invitations on occasion for beta testers, sometimes publicly and other times privately. If a private invitation is made you will see it and can ask to participate and/or meet the stated requirements. There is no list of preferred beta testers.

Beta testing can also include purchasing an item at a first run discount. I did this with the PSAudio LAN Rover a few years ago,