I literally just finished playing a game on my computer right before I read this thread. Here's from wikipedia:
Scoring variants There are many scoring variants including: The 10♦ or J♦ is a "bonus" card, subtracting 10 penalty points from the player who captures it. This is called the "Omnibus" variant and is very popular in some regions.
The 7♣ is another penalty card, worth 7 points, in a variant called Hooligan Hearts.[8] A player reaching exactly 50 or 100 points subtracts 50 points from their score. Different points are allocated to each penalty card.
The A♠ can also be a penalty card, and sometimes also the K♠ and 10♠. This is unpopular as it means any penalty Spade, not just the Queen, must be "sloughed" by playing off-suit. Higher penalties for the high hearts (e.g. A♥=5, K♥=4, Q♥=3, J♥=2).
A player who takes no tricks in a deal subtracts 5 points from their own score. A player may declare before the first card is played that he or she will not take any hearts on the upcoming hand. If they succeed in their pledge, they may subtract 10 penalty points, but if they take any hearts they are assessed 10 additional penalty points. Each numbered Heart (2–10♥) is assigned the numeric value in points, each face card and the Ace of Hearts counts as 10 points, and the Queen of Spades counts as 25 points, making a total of 119 in any given deal similar to Schwarze Katze.