For veteran Jake Orta, a billionaire’s trash is treasure. After becoming homeless and then living in subsidized housing, Orta became a full-time trash picker, making about $300 per week. While illegal, the practice is rarely punished. The first rule of dumpster-scavenging, he said, is to make sure there are no raccoons or possums. Nick Marzano, who publishes a magazine that documents trash-picking in San Francisco, estimates there are several hundred such scavengers citywide.