I don't always have time to battle with my cards, however, I would like to earn from them at the same time. I briefly remember a service that allowed you to delegate your cards to them and they would play with them instead. Does a service such as this still exist?
As far as I know there is only one service: https://peakmonsters.com/
I used this service for a while and it works fine. The ROI is calculated on a monthly base, it’s no APR.
If you have a person you trust in your guild, he could play for you but you’ll have to give him your posting key.
P.S. I tried to upload two images for illustration but it doesn't seem to work on Quelle yet