$100/mo at 20 evening-hours/week is $1.25/hour. The math doesn't justify the hours unless you're learning skills you couldn't elsewhere or the path to $1k/mo is clear within 90 days. Otherwise: either commit a quarter to push it to $1k+, or sunset it. Indie purgatory drains the energy you need for the next project.
My side project makes $100/mo but eats every evening, about $1.25 an hour. Help me make the call: is there a clear path to $1k/mo within 90 days, or real skill-learning, that justifies the hours? If not, plan a clean sunset. Walk the math with me and recommend commit or sunset.