Can cloud-based quantum computing really offer a quantum advantage?

https://phys.org/news/2023-09-cloud-based-quantum-advantage.html

"entanglement witness circuit, a mathematical function relating 2 specific qubits and their states, certifies entanglement even when cloud-based service allows only limited machine control... detect entanglement using only the measurement statistics output by the service.. They do not need to be able to control qubit allocation... EW 2.0 twice as efficient at detecting entanglement"