Can you quote me their claims of thrust? There are no press releases on their website with any claims that I can see.
The force required to maintain orbit is not high (I think 30-230 micronewtons), but this has to be sustained over six months. If they are determined to cheat, they can certainly do that with off-the-shelf cubesat thrusters.
Without thrust, I believe the thing would fall to earth in a few days from 150 miles. Though small, the drag at that altitude is high by orbital standards: going down from 400km LEO to 240km greatly increases the drag. If there is nothing but an EMdrive on the satellite, you actually have a very quick test result, if you believe they are not cheating.
If it flies for long enough, the drive is categorically working, whether or not you think they might try to cheat. Lowering the flight altitude shortens the duration of 'long enough'. A determined skeptic might need some years to be convinced, I guess.
Why would they spend the money to put it in orbit without having measured ample thrust for the mission in the lab?
They could maybe be crazy and/or crooked, like Rossi, but let's hope not.