Bug told me that he has started working on moving more of the HST over to the new system so Thimblerig is probably one of them. I have not been told if the 10k prize is coming back but for now it is intentional that the reward has stopped while they are moving everything over.

I have been told that no scores on the old system have been wiped, and several are still being tracked (just no longer displayed on the website) while they make sure things have moved over correctly. I am pretty sure there is going to be more of an update when they do their monthly sprint update.