Will it be possible to test the platform before the official launch? If there is access, then it will be possible to determine if there are errors in the development.
Most projects will let you beta test their site cause that helps them cut down on hiring actual testers and use people are cheap or rather free labour
I agree to this statement of tour's,as this may be one of the most efficient and effective methods for testing.
Why do you need to test the platform, if the platform is already fully operational. Go to the official website and check it is very convenient and practical.