Can anyone explain MyVegas comp room bonus

I now notice that you can get a one night comped midweek or weekend room and some say bonus. Can anyone confirm if that may include an extra comped night? They cost more LPs to buy. And if it is an extra night, is there a way to find out what the restrictions may be. Thank you in advance for any reponse.
I believe the main difference is on the availability calender. Each hotel has a list of the nights that can be booked with each type. The "bonus" rooms have a much smaller availability. As far as restrictions, you need to read the second page of the reward for each hotel. Mandalay Bay has virtually no restrictions (consecutive nights etc), the only criteria being blackout dates (again listed on the second page of the reward).
Thank you for your response.
When I first saw the "comp room bonus" designation I had my own explanation/explanation, that it required a room stay whether purchased or comped. But Beaker's response makes more sense.

Does anybody know when they post the bonus nights on the calendar? Looks like there is nothing after February (at least for Monte Carlo) and I'm looking for dates in March.
Does anyone know if you have to pay the resort fee on the MyVegas comped rooms?
Yes,you have to pay resort fees on MYVegas rooms.It is noted on the rewards.