I invest $ 100 to start renting max level cards. About 120 cards in total at the end. I paid $ 3 a day for it.
From the daily playing, quest, the prize league, and the tournament, I managed to pay for rented cards and to be in the top 50, even 25 at the end of the last few leagues.
I didn't make money in the end because I had to pay rented cards, but I enjoyed playing the game with the best players.
From now on I will play with my cards, I have all level 4 UNTAMED summoners. Maybe I'll make it to the champion league. And feel what it’s like to play relaxed and earn DEC to keep it.
I hope you find a way to start renting on your site again, maybe someone will do what I did and enjoy the game in the same way.