by tumorous
It's in the company's interest to let potential backers suspect that these might be limited, without making any commitment to "Kickstarter exclusive" products. And so that's where we are at.On the one hand, yes, Candy and Cola have been continually for sale. The model seems to be on backorder more often than not. Six new minis on production and in stock would be seven times the time, effort, and inventory.
I'm not sure whether the perpetual backorder status of Candy and Cola means "demand for SDE promos looks high, so we'll keep producing and selling them" or "we don't care enough about SDE promos to bother trying to keep them in stock."