Raising Money for Charity & Selling T-Mobile

The common variable for success? Hot women (this important PSA brought to you from Freakonomics Blog). Here's T-Mobile's take on it:

Here's the academic literature (MIT Quarterly Journal of Economics):

in terms of both maximizing current contributions and inducing participation, we find that a one-standard deviation increase in female solicitor physical attractiveness is similar to that of the lottery incentive.