In my opinion this happens because people start projects as a side project, then they get attention and need more and more time. So either you somehow invest mo

In my opinion this happens because people start projects as a side project, then they get attention and need more and more time. So either you somehow invest more time (work less on your normal job) or get more contributors/ a team. The first option is happening more often, so you need income to replace your normal job where we mostly end with your described situation.