Yes, for the sump I have the sensor bypassed to allow the system to arm. I have it bypassed in ST so I don’t have to manually bypass each time.
The power detector is used exactly like you are thinking about using it - a freezer with hundreds of dollars of meat on a garage GFCI that I wouldn’t have clue if it tripped. I ordered this relay, but have begun to wonder if there is a lower power draw option.
Interesting hack to use them as a tilt sensor. I currently have one rigged up with a large rare earth magnet on the side of the door, but that just gives me opened/closed status. Can you elaborate on the wifi relay setup?