I made the NIT and i saw that their was $1.75 added to my account?

You get money no matter what.  Below is straight from the FAQ.  It tells you how much you get for finishing where.

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

ya but doesnt it say you would get around a 1 dollar back?

You do not get anything for the NIT.  Players who miss the NT get a credit after each season just for playing.

I've actually wondered how it determines what the value of the credit is, because it definitely varies.  Maybe it has to do with the population of the world?