I stopped actively playing when rewards became locked behind 'focus'. I am a bronze 3 scrub and am unable to even break free to bronze 2 in 'Modern'. Instead I rent a lot of my cards out and still buy cards on the market that look interesting for me with the DEC earned from renting. This was a informative post though, thank you for sharing about 'Niftyarcade' I'll have to check it out!