Is beta only be available for big investors?
Well i guess it depends whether it will be the open one or not.But its not a bad idea,to give big investors early access.
I agree, early investors should have the first right to test the platform, but I hope that they will later run open beta testing.
It is good to have it for public sale investors too, not only early investors. And IMO it should be before the sale so that people can see what they are investing in.