Is the decrease of earned amount normal?

[4a9b5f91]

I have already crossed the 2K milestone in 12-month earnings, but for a few weeks, I have noticed that the total earning is decreasing, and now it shows below 2K in My Stats.

Is there any issue with my account?

[martina_plaschka · Accepted solution]

Lifetime earnings: increase over time, unless you do a refund.

12 month earnings: go up and down over time. 

[4a9b5f91]

Thank you so much. I understand the algorithm now.