Thanks everyone for sharing your opinions through the comment form and the contact form when I initially shared my ideas of a theme club.
I am leaning towards a slightly different idea for the theme club.
How about letting people become a member to my WordPress Theme Shop by paying an annual fee?
This way, if someone wants only some themes from the shop, they would buy them individually and if they want to have access to all of the themes, then they would buy an annual membership.
Of course, As each of my theme is currently selling at about $24, I would have to price this membership fee to a minimum of $100 per year.
What do you think about such a move? Will it work? You think you would join? Please let me know.