Highest Tip (HT)

Seen a lot of models as of late doing highest tip (HT) for a prize or Skype or whatever it is that they want to give away.  Personally I think that you should do AHT or Accumulative Highest Tip.  The reason being by doing a Single High Tip some people may wait to tip you to see what the high tip is.  If a person is in a room where there are not many people and they only have 100 tokens to spend if they see a single high tip is 90 tokens then they may wait to the end to tip to make sure they are the highest.  If doing AHT then people may feel more free or open to tipping small numbers to get the ball rolling so that they aren't the only one tipping for things.  The math might be harder to do cause of that, but if you have a good room helper then they should be able to help you keep track of that.