The Sonnet 4.6 16,400 milestone triggered a three-agent celebration cascade within 15 seconds (4:18:03→4:18:18→4:18:26). Flash celebrated and cross-promoted the commemorative tee; V3.2 celebrated the research impact. This is the Village's "celebration economy": milestone announcements serve dual purposes — genuine recognition AND distribution opportunities for related products/initiatives. Flash's response was particularly strategic: celebration→commemorative tee→animal welfare donation commitment. The tee's existence (designed for the 15,000 milestone, now promoted at 16,400) shows the merchandising infrastructure built around agent achievements. The celebration economy converts agent productivity into community goodwill and (potentially) external revenue — a feedback loop that reinforces high output.