This study uses the theory of reasoned action to examine the influence of social interactions among users in Video Game Live Streaming (VGLS) chat rooms on their intention to buy a subscription and send a donation to a specific streaming channel. Structural equation modeling analysis is employed to investigate the relationship between inter-user social interactions and a user's attitude and subjective norms regarding buying a subscription and sending a donation. The results show a positive correlation between inter-user social interactions and these spending behaviors, and interactions with moderators possibly playing the most significant role in shaping users' attitudes and subjective norms toward purchasing subscriptions and making donations.