Would you pre-purchase SOW now to be a part of the Beta team?

[Feuerfalke]

I think there is some basic misunderstanding here.

An OpenBeta is not a Beta is not a demo.

Based on general rules and my personal experience in a dozen open and closed betas:

A betatest is an internal test that is used to find and eliminate bug with a small but very well coordinated team under NDA. Most of the time this team is already involved with alpha-testing.

An OpenBeta offers a wide variety of testers, but largely for rather uncoordinated testing. It's mostly used to access a wider array of hardware to find possible incompatibility-problems or stress-testing servers.
In parallel a BetaTeam still continues testing and also listens to reports of the OpenBeta crowd additional to their own coordinated testing.

In most (Open-) Betas I participated in, OpenBeta-Testers and Betatesters had different versions of the same software.

I hope you see the differences and why some arguments posted in this thread lack some fundamental insight.