  Numerous forms of consumer-generated media (CGM), such as social networking
services (SNS), are widely used. Their success relies on users' voluntary
participation, often driven by psychological rewards like recognition and
connection from reactions by other users. Furthermore, a few CGM platforms
offer monetary rewards to users, serving as incentives for sharing items such
as articles, images, and videos. However, users have varying preferences for
monetary and psychological rewards, and the impact of monetary rewards on user
behaviors and the quality of the content they post remains unclear. Hence, we
propose a model that integrates some monetary reward schemes into the SNS-norms
game, which is an abstraction of CGM. Subsequently, we investigate the effect
of each monetary reward scheme on individual agents (users), particularly in
terms of their proactivity in posting items and their quality, depending on
agents' positions in a CGM network. Our experimental results suggest that these
factors distinctly affect the number of postings and their quality. We believe
that our findings will help CGM platformers in designing better monetary reward
schemes.
