You see the screen to the right, and the approximate translation from German goes as thus:
Update: From the PTR Patch Notes:
Not clear if that’s the highest Grift completed total on your account, or if you’d get an increase for your highest Grift per class (to reward people who play more than just one class), but I assume it would be account wide. So if your best solo Grift cleared was 40, with any or all classes, you’d gain 400 to your Blood Shards cap, up to 900.
Tying it to your GRift clearance, instead of something like Paragon Points, makes sense because 1) Blizzard has tried to avoid rewarding players simply for grinding levels, and 2) clearing higher GRs is where you can rack up the most Blood Shards, with GRs above 25 rewarding progressively more shards above the ~100 you get for a T6 Rift. And when you’re rolling up to 250 shards every ~15 minutes, the cap of 500 feels even more restrictive.
What do you guys think?