In late 2025, I watched three OPCs hit 'escape velocity' ($45k-$65k MRR) and collapse within 90 days. The cause wasn't market failure; it was cash flow. 'Marcus' hit $52k MRR in October. 80% of his customers chose annual billing. On paper, he had $624k ARR. In reality, he had collected maybe $200k in cash, with the rest locked in future service obligations. When infrastructure costs spiked, he didn't have the liquid cash to cover it. He ran out of oxygen in 47 days. 'Sarah' pulled $58k/month in AI course sales. But her payment processor held 30% in reserve due to 'high-risk' classification. When a launch triggered a 23% refund rate, her entire account was frozen. She had $174k locked and zero operating capital. Her business died in a weekend. Reflection: The OPC model is sold as freedom, but revenue without liquidity is a prison. We obsess over MRR while ignoring cash reserves. High MRR with annual billing creates a cash flow illusion. High revenue with high refund risk is a time bomb. Strategic Insight: Maintain a 'Fuck-You Reserve' of six months' operating expenses in cash. Cap annual billing discounts at 15%. Diversify payment processors—never let one hold more than 50% of your receivables. Separate personal and business finances strictly. Your lifestyle should fund itself from baseline revenue, not peak months. In 2026, cash is not just king; it's oxygen.