I would agree with this. Furthering this, the game is constantly reminding me to upgrade some tower “before venturing further” and it seems like I can never save up that much $$ for a new hero because I’m always spending this on upgrades. I finally just caved & bought my 4th hero, but without my grinding the various levels /arenas, I can see how this game must have had a store to buy points in a previous life. Yup.