But if I'm on a 50K for 25 nights promo, and made 25 nights with an average spend of 200/night, I could net around 100K points from double points + 50 K.
Bottom line, people didn't like the 1-4 certs. Many complaints here and on Insiders so Marriott is trying something new.
The other good thing with this one, is it is incremental. If you fall somewhere between the 4 stays for 2 certs vs the big number of nights for the points rewards, every extra stay or night gets you more points, even if you don't make it all the way to the top level.