Since there are no temperature sensors in the exhaust I'm not sure what they mean by temperature below a specified value. Maybe the engine temperature but the air flow would only affect the exhaust temperature. Maybe they mean while the engine is warming up and before it transitions to closed loop. But you're correct, the AIS will only be on during open loop - idle and acceleration.

It will be off during high throttle settings because of what Yamaha terms as "self EGR". The two way valve on the carbed bikes shuts off the AIS during full throttle for the same reason.

The valve will open though during less than full throttle acceleration when the system changes to open loop. One would think there wouldn't be any negative pulses with a stock setup at 75+ mph but there are. I can put my fingers on the AIS pipe and it's not even hot.

The only neat thing I've seen about the PC add-on is its ability to lower the cut rpm's. I don't know at what rpm's Yamaha turns the injectors back on but to be able to lower it can increase fuel mileage and probably stop the popping even with the AIS still connected. They say that there is a hesitation if the cut rpm is fairly low but with the injectors on the Road Star pulsing once every revolution I don't think it would be too bad. Be interesting to see someone come out with a module that did only that. Kind of like the low cost one for the earlier bikes that only raised the rev limit.