You two guys are perfect examples... Here one day....then drop off the face of the earth. So you could give some specific examples

Most sites like this have declined in traffic....
1. Thousands of new sites have been brought on line in the last 10 years

2. Even the harware and software sites have their own forums

3. People's interest change

4. Heck, if I started dating a new hot babe - I'd be on line less...

5. The list goes on