I’m a regular at AC and will probably make 7-star this year thanks to an uncommonly lucky run I’ve been on allowing me to take some shots at the higher limit machines without risk of damaging my bankroll. With that said, it appears if I book a room through my host in AC and my status is ‘RFB’, I am not charged the $13 tax. When I’ve booked through my host in the past and my status was ‘LFB’, I would be charged the tax, but could ask for it to be paid with my reward credits. Prior to being LFB (though I was a Diamond), there was no way for me to avoid paying the tax nor could I use reward credits to do so. Now don’t quote my findings as the gospel, as there could have been other variables unknown to me at play, but it seemed like this pattern was consistent for me.