Ack! Loss aversion adding to the addiction potential.
I'm actually pleasantly surprised to find that I feel a degree of reward at noticing my score drop. It indicates a reduction in internet time which has something of a causal relationship with productivity. I think I'll encourage that framing!
Is the karma shown that accumulated from posts and comments that were made within the past 30 days, or from all votes on all posts within the past 30 days, regardless of the age of the post or comment?