True if the rocket were firing a machine gun or canon backwards, but not true if it is, as of course it is, a gas that is leaving the rear of the rocket. But again, before explaining this, let me note that neither the rocket nor any of the exhaust "go into orbit" Recall that to make this clear, impossible to miss understand, I said the fuel was aluminum dust and O2, which burn together to make Al2O3 dust that falls to the Earth surface, Now about you gas in space, even though it is contrary to the thread's assumptions: First note it will rapidly expand into a vacuum, and if in sunlight, surely ionize. Being very small particles, perhaps only atoms or molecules, these charged particles will orbit about the magnetic field lines. The solar wind pushes these field lines about quite strongly if you are far enough form Earth (a few Earth radii) to be speaking of "vacuum," instead of "residual atmosphere." (There is not clean line between these terms.) These particles will also feel solar radiation pressure. Recently a private group paid Russians to but up their "solar sailor" space craft, which was to go (slowly) far from Earth on this light flux, never achieving anything like "escape velocity" but, escaping. Unfortunately, the launce failed some way - I forget details. Because of solar particle and radiation fluxes plus the dynamics of Earth's magnetic field, especially the "tail" being whipped around by fluctuations in the solar wind (particle flux from) some of these gases do not need to coast away from Earth, with "escape velocity." They will be accelerated away by the sun. The sun will also keep them warm. In a thermal distribution of velocities (Some what doubtful that their collisional interactions can maintain this, so they really do not have any "temperature," but still will have some distribution of velocities.) a fraction will in fact have the escape velocity. In short summary: Because of these effects, and fact that even at geo-stationary distance the satellite is bound, (has significantly less than the escape velocity) I suspect that 99+% of all the gases that leave the micro thrustors used to fine position the satellite into its assigned geo-stationary position are: (1) With less than Earth escape velocity, yet (2) do escape from the Earth.