Apart from the stay X get Y, I get the impression that the following 5 still work for everyone:
New member bonus 1500 pts. (8853)
Elite member next stay bonus 3000 pts. (2697)
Next stay bonus 1500 pts. (1848)
Welcome back bonus 1500 pts. (7830)
Anniversary bonus offer 1000 pts. per stay for 90 days (2775)
+ possible the new weekend code 3782
Those might infact be the only ones that still do work