Shareup Survey Project has the results of a shareware authors survery they revecently conducted. There is some good information on what percentage of people use registration services and which service they use. There’s also results for ad budgets, affiliate programs, and country of origin.
The most interesting to me were the last two questions, age and full time status. An amazing 47.9 percent of respondants are full time shareware authors. That’s much higher than I would excpect to see. The age results were revealing as well. The majority of shareware developers fall in the range of 31 to 40. I guess that’s the age where most of us get burned out on corporate life and look to strike out on our own.