Rewards come often early on in the game, but if you want to successfully play for the long term, you must have patience (or lots of real money to piss away). I thoroughly enjoy this game!
Update 5/31/16
Been playing this game for some time. There are no more incentives to play i.e. Fan rewards, discounted skill upgrades. Would like to see those back but with an old game, developers may not be interested anymore. Ill keep plugging away until I max out on skills and beat legends, too far in to quit.
Smittybuilt87 about Tap Sports Baseball, v1.6.0