I too have noticed a dip this season. I did manage to lift it a little (20DEC/day) by going through and checking my rentals, I found some max Legendry and Epic cards that had somehow come off rent, there were some others too, but I'm not 100% sure I had those up for rent previously, whereas I KNOW I had my max cards listed originally.

We are running about the same level of rental income but you seem to have 4 times the value in your account. My account is only for rentals, maybe you have your playing deck in there too ?

Have you seen this Rental RoI tool by @arc7icwolf ? https://splinterroi.streamlit.app/