I use LOI's a lot when I am trying to buy a property for much less than what the seller says they want, more flexible terms than the seller says they want OR if I am unfamiliar with the property and area I will use the LOI to start the negotiating process while I do my due diligence work in the background. Remember, most of the time an LOI is not a formal offer but mainly a point of understanding between you and the seller.
The NLI is binding with the institution, not the coach _ If the coach leaves the institution (voluntarily or not) the provisions of the NLI remain in effect. The NLI does NOT guarantee a spot on the team _ The NLI only guarantees that athletic aid will be awarded for one academic year. All decisions on rosters and playing time are rendered by the coaching staff at the institution.