[Opt-in Prerelease for 1.1!]

17 minutes ago, schatzfinder said:

That makes me think that they gonna choose these 100. And that's why I thought you would need to apply for that and get the code for the beta.

It's 2 different things.

Experimentals is closed beta and you do need to apply for that.

Pre-release is open beta and you just need to opt-in in your steam client to participate.

Experimentals are in progress now. When it's done, pre-release will be announced.

[Opt-in Prerelease for 1.1!]

1 hour ago, schatzfinder said:

Also how do you opt-in then?

You opt-in in the Steam client. When pre-release is announced it will appear there.