Although Saints can be mysterious in their ways, sometines more prosaic explanations suffice. Sadly real life doesn't respect the near-deity status of saints on perlmonks. Some are taken away from the site for weeks or months at a time. But many (most?) come back after a while.
On the glass half full side, some saints here contribute almost continuous support to the Perlmonks community. I am in awe of their dedication and attention span.