I have followed Simone Giertz for a some time, known as the queen of shitty robots on Youtube. Yesterday or so she started a Kickstarter campaign for a product that is a calendar of sorts, where each day can be turned on or off. The campaign suggests to use this a “gold star” setup - light up for every day you do something. A lot of the sales pitch sounds very similar to Beeminder (or Habitica or others), but it is also hackable/programmable/buildable, so maybe an integration with Beeminder isn’t totally off the table?
Disclaimer: I’m not trying to sell this product (and I don’t think I will buy it myself either), but it looks interesting and well made nonetheless.