When are credits applied to your account? Or I guess how soon after the season?

I believe credits are posted after the NT championship game is simmed. 

Well I never got mine. I was in the championship game

then you don't get credits, you get reward points i believe (having never made a championship before)

Oh ok...i thought u always got some sort of credit/$ for getting so far in the tourny, etc.

The 2 teams making the NT title game get the reward points, which can be spent on GC's.  At one time, you could buy Amazon GC's with those reward points, but I'm not sure if that's still the case.  You can access everything from your locker room.

A: Yes, there are prizes - win or lose! If you do not win your conference tournament or receive an at-large bid to the National Tournament, you will still receive a discount on your next Hoops Dynasty season (discounts vary based on the how well your team performed). If you do receive a bid to the National Tournament, you will receive reward points good for use in our Rewards Center or credits for use on future Hoops Dynasty seasons. Here's the breakdown: 

• Lose opening round game: $3 in credits
• Lose second round game: $5 in credits
• Lose Sweet 16 game: $10 in credits
• Lose Elite 8 game: $15 in credits
• Lose Final Four game: $20 in credits
• Lose Championship game: 4,000 reward points
• National Champion: 6,000 reward points

 the FAQ