Operating without a licence
No tourism licence at all — booking one order at a time and outsourcing guests straight to unlicensed drivers to pocket what they can. No taxes, no capacity to absorb any mishap. Even a small problem can leave a guest stuck in place, the trip broken off. Examples like this aren’t rare online.
Licensed operation, with trip liability resting on the company itself. When something unexpected happens, someone is responsible and able to coordinate — instead of dumping the risk back on you.