I've had this exact issue! I'm trying to accept that not everyone can afford to tip but still like to watch. So, I've convinced myself that it's important to build an audience and hope that when they can afford to send tips, they will. For example, on Xhamster, I have 63 subscribers but have received tips from 7 different people. I feel like persisting with live shows and hoping for more subscribers is what's going to keep me going.