PROS event rewards have been recalculated and fully distributed, no need to worry about it. It seemed like it was gone in seconds this morning, but now it’s back to normal.

One account can get 0.0005BTC, which is about 50u. Plus there are 55 pros, that's another 30u, totaling 80u. The project team is really generous; if airdrops were as generous as this project, that would be great.