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Its a great way make use of your idle cards.. Besides renting them out its the best way to help your collection keep earning.

Indeed its allowed, I have listened into the AMAs and they stated there are no plans on getting rid of them.

Well, all of my cards are idle. I don't really play anymore, the few cards I had is rented out and earning me shit since I didn't it before the spike :p

Based on your cwow2 account you may not have enough, but you can try and see what happens.

https://peakmonsters.com/@cwow2/collection

My bots have close to 100 cards each and with less it tends to miss battles sometimes.

I can always just buy some cards, might be too expensive at the moment.

ye well, I just wanted to get some free Dec :p

Id say just try and see if it works. Add more cards if it does not win any battles over the course of a day.

Seems a lot easier to just rent out idle cards.
It would have to be a way better return to justify the above effort.

Depends, I earn about 3000 DEC a season per bot. Not sure what cards earn renting them out....