Are airlines and hotel companies trying to benefit from charity donations to Haiti? When you donate miles or points, how do they decide into how many dollars your contribution converts? Should they be more generous than they are?

Every major U.S. carrier and hotel chain is offering the members of its loyalty program to redeem points in support of earthquake relief operations in Haiti, which was almost totally devastated earlier this month. For many Americans who may be short on cash but have thousands of points in various accounts, that is a rather attractive option…