?
would it be correct to say that anyone who has 2 new sign ups now is less likely to also be a diamond member (takes longer time to achieve diamond now than in the past -- and wouldn't they have already used/sold their sign up nights?)
Those 60 days in the past when they were a diamond member had to perfectly coincide with the time the signed up for the CC, spent the minimum, waited for the statement to close, wait for the nights to post, post them on DDF, sell them, make the reservation and stay at the hotel. To get that diamond challenge, they had to also have a top elite status at one of very few competing hotel groups. They had to have at least one night on the hotel statement. They had to apply and get approved by Hyatt. Most of the DDFers that got the Hyatt diamond challenge in the past, stayed 12 nights (by offering DSU's in this thread) and kept it until Feb 2016.