There seems to be a lot of believers in the trick on here and it gets heated conversation, so here's my take.
Does anyone believe that multi billion dollar companies "randomly" allow hourly employees at a front desk to make decisions to give away potentially valuable upgrades to just anyone off the street?
Or is it possible that there is a critiria that the computer considers if someone is eligible for an upgrade based on factors such as players status, rate paid for room, expected occupancy percentages for the night and such?
Are there employees that would risk their job and have to defend an upgrade that did not make sense from a business standpoint for a $20 bribe?
Casinos have almost everything down to a science from a numbers standpoint, yet some think that the filling of casinos rooms is just left to an employees hitting a button to "see whats available".
I'm not out to say anyone is wrong with their belief that it has worked, but I firmly believe that so many other factors come into play that the $20 has little to do with it in the majority of upgrades.
So tell me why I am wrong and sell me on it.