Around 16 people a day request this keyboard.
As this keyboard needs 2500 for the drop to be active, you can calculate how long it will take before it will drop.
To a degree. Requests are only to show interest but unfortunately do nothing for activating the drop. Activating the drop depends entirely on the manufacturer.
So this drop started about 1-2 months after the previous one ended. This one is scheduled to ship at the end of February, so if the past is indicative of the future, the next drop should start around April