It just so happens that big corporate gifts coincide with big events (and big disasters) in corporation's hometown.
"A recent research paper shows that enormous events like the Olympics lead to a dramatic, albeit relatively short-term increase in otherwise steady charitable-giving patterns among firms that are headquartered in the event’s host city. Natural disasters also have a strong effect on firms’ giving patterns, according to the study Punctuated Generosity: How Mega-events and Natural Disasters Affect Corporate Philanthropy in US Communities, which was published in the March issue of Administrative Science Quarterly." -- Carmen Nobel, Forbes
