I run SETI because a friend introduced me to the website and BOINC in general. I don't really use my computers for any large tasks, so I decided someone else could better use my computers' processing power.
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.