[2020] Free premium battle pass? 15 levels? 800 bitcrowns?

Some people got one of those gifts today.

The theory (not official / no source^{(see Edit 2})) is, if you played the open beta^{(see Edit 1}) , you get:

1. Premium battle pass if didn't have already;
2. 15 ranks/levels/tiers if not maxed at premium battle pass;
3. 800 bitcrowns if maxed with premium battle pass.

Edit 1: Some people that didn't played the beta got the reward too.

Edit 2: Some people received an e-mail about the reward.