Keeping renting profitable

For example, I don't really do well with my fire Splinter deck and I have rented out all my fire splinter cards. But there will definitely be someone who would like to play only the fire splinter deck and rent those cards from the market. These cross references make the demand and supply very interesting. As I said earlier, I would like to keep the card rented most of the time than staying without getting rented. For this, I don't even mind placing some cards for a cheap price. My overall thoughts are always on the APR I get from renting. As long as the APR is above 50%, I'm guessing the rentals are very good.
The next most important thing is the utilization of the season-end rental demand. People rent a lot of cards at the end of the season. As they progress to higher leagues in the game, there will be a huge demand for an increase in Collection power. This can be achieved by renting cards from the market. I have rented out cards for even more than 4000 DEC per GFL card every season. Making use of this demand is very important when it comes to rental income. It can be a very good source of passive income. Even if we get 100 DEC from renting, I would say it is good because we will be able to either book profits or purchase a lot more cards from the market.
The next most important thing is the place where we can make these adjustments to the rented cards. Most people are still using Splinterlands user interface to do the renting and adjust the price. It is too painful to do there especially when there is a need to do things in bulk. I would personally recommend using Peakmonster's user interface to do some nice filters and make adjustments. It makes our life easier when it comes to rental systems. I do see that things can also be a little better. Hopefully, there should be some more competitive user interfaces in the future for the game.