I think it was more of a situation of being out of stock, also not particularly usable without carrying a cumbersome reader of some sort.
Now with the Flipper Zero, and being popular and compatible with xBT, it was popular enough for Amal to get more stock,
however, it was so popular, its now out of stock again.
I can only presume Amal will be getting some more to meet the demand…
I believe this was the latest update,
He may have sold them out, or yet to put them on the store