Some time ago I've made a question involving Jetoptera bladeless propulsion, and got a comment saying they didn't know how that method of propulsion would make any difference. But I forgot to ask more specifically about said propulsion system.
The thing is that the Jetoptera's aircraft claims to use this same motive flow to produce thrust, and like any other company with a "revolutionary idea", it claims it is more efficient at producing thrust than other types of propulsion systems.
More information about how Jetoptera is (supposed to work) in this video and in this video, in the original channel of Jetoptera it only show tunnel testings and gliders with two hollow boxes that you can't even tell if they're actually working.
Ignoring the claims of efficiency (maybe even the Jetoptera's case itself) and so on: would the motive flow be any good as a propulsion system by itself?