Most members I know attend red ball and white 50 over matches, and some attend selected T/20 over matches.
I could understand a separate T/20 category, but I'm not keen on splitting them up.
Members get priority for T/20 tickets if they wish to attend and that is right.
This year IF spectators are allowed, it will have to be by a selection process, and the public members won't get a look in, apart from T/20 games which MAY be open to them.
I did ask the club about how the selection process may work but have had no response.