Greeks are:
1. Predictable: If they purchase stuff for an event one year, they will the next 2. Bulk: Everything they purchase is for their entire house 3. Lucrative: At UPenn, the average budget is ~$125,000 a semester, and that's money each house MUST spend.
How many customers must spend that much money, in predictable ways, in bulk? So the question begs, do these pros outweigh the con, the size of the market?