Yes! Please do.  If you're listening to new shows, the best thing to do is to upgrade your membership to reflect that! This means that the shows you listened to before won't get a pay cut when you add new shows to the list. If you can't afford to increase your donation, you can also spread out your current donation more by simply updating the list of shows you support via that same link. Just make sure to select the button that indicates no change to your membership level.