nice for a while. but the balance is off. the actual values are not what it says on the cards. this leads to a pointless churn that even on the 4x speed takes way too long. (should be 534K/s but is 80.1K/s) 
Thanks for playing and for the screenshot, it made this easy to track down! You’re right, the cards were wrong. They showed a tower’s full rating, but towers only pay 15% of that passively, and the rest comes from killing creep. The card never explained that (534K × 15% = 80.1K, exactly your number). It’s fixed now: the cards show the real passive income plus a “kill bounties” note, so they match the HUD. A major patch is also coming today with a new mechanic, a skill tree and new towers, which should make progression a lot less of a grind.