Real DOs bill wall-clock time at 128 MB each. The pool bills a container plus the CPU it actually uses.
List prices, Workers Paid, free allowances ignored. Pool capacity measured: one basic container (¼ vCPU, 1 GiB) runs 1,000 awake 1 Hz objects at ~0.2 billed vCPU. Break-even ≈ 0.3% awake (~2 h/month).