The rise of Cameo, the message service that can earn athletes $30,000 a day

Retired sports stars used to travel to conventions to make money from autographs. Now they can haul in cash from the comfort of their own homes

The first Sunday in February - the day of the Super Bowl - was always a key date for Hall of Fame quarterback Brett Favre. Now the second Sunday in May looms large in his work calendar.

Leading up to Mother's Day, I think I did 80. Basically 80 Mother's Day Cameos," says the former Green Bay Packers star. Christmas, seems like holidays, special occasions, they ramp up. Maybe five to 10 a day. There may be a couple of days when I do none and then 18 show up. But generally, like Valentine's, it kind of ramps up."