SpinterRents has closed due to this crappy decision. While I sympathise with your costs situation, the fees have made SPL like any other chains (you pay), so I don't agree with what you are doing.

Change the amount of times you can re-rent to remove the transactions but don't charge us (the buyers of your cards) fees. This is why I will be downvoting this post (not that anyone ever looks at the comments from Splinterlands anyway).