I've rented out some cards, but not making too much from that. I've heard of people starting with a new account and making good progress just by renting the cards they need. I think the games benefit from having various options in how you play.
!BEER
Totally think it's worth it. Rented out quite a few cards and started playing again. Almost made 1000 Dec since I last posted. But that is mainly from gold foils!