I think some of the hotels use this information to send out individual offers to customers. Last june we spent a long weekend at the La Quinta resort and Spa. It was our first time at the property and maybe went a little overboard at the bar and resteraunt(all of which rocked). we then followed that up with 3 more stays in the next 4 months(gotta love cheep palm springs rack rates in the summer) I then received a letter from the resort including a voucher for 200 off food and drink on any 3 night stay thru the end of 2011. I dont think this was jsut randon but more likely them watching my pattern of spending. That or they noticed my 3 year old really loves all 41 of the pools they have on grounds