Thanks for the information. Good to know.
I can somewhat understand your disappointment (I'm a 28 stay HH Diamond myself), but I don't view this as unfair. Just like all customers are not alike, all Diamond HHonors members are not alike. There are Diamond members that may stay 100 nights a year vs. those that stay only 50 nights a year. Both are probably in the top 10- 15% of Hilton customers, but which is more valuable/profitable to Hilton? As a business and marketing person, I'd fawn all over the 100+ night customer. That's the essence of good loyalty marketing.
But that doesn't make us chopped liver. We still often get upgrades, additional bonus points, room guarantees outside 72 hours, etc. Anyway, how many of the 1-4's do you think there are? Their numbers are small so the probablity of them impacting our perks on any given stay is real, but low.
Although, I wonder whether the Diamond rankings to which you allude should be (or truly are) based on stays. It seems to me it should be based on total dollars spent. For example, a customer who stays 28 times with an average of three nights per stay (Total = 84 nights) is presumably more valuable than a customer that stays 40 times at an average of 1 night per stay (do I have to do the math?). Further, a customer who generally stays at Hiltons may be more profitable than a customer that regularly stays at Hampton Inn. And a customer that travels during peak business rates is a better customer than those that stay mostly off peak/weekends. And a customer that spends more in the hotel restaurant and bars is potentially a better customer. Anyway, you get my point.