I run SETI@Home because I support the development of science, and in the event that we ever receive any messages, or have the opportunity to make any observations, I want to help in making sure that we're not ignoring them.
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.