I used the sign up form for the Android Beta and received the confirmation email my Google account provided has been added. However when following the link I get an error saying my account is not eligible.
I think Plex may have added the wrong Google account as it is different to my Plex email, but I did specify this correctly in the form.
Same here as well. Received email about acceptance last night around 3am and no access at all in the playstore with the correct email signed in to google.