Starwood is offering a small but nonetheless easy 150 Free Starwood Preferred Guest Points for Updating your security questions.
All you have to do is go to the security questions via the link below and update them, I suspect it’s a little bit of information gathering by Starwood but free anyway:
I’m hoping that I don’t get asked these questions frequently as I’m bound to forget!
The site makes not mention whatsoever of the 150 points but you can check out the Flyertalk site which details that it is official. Here’s the Flyertalk link:
The only rules you need to follow is that you must have been a member prior to October 8th and you must complete the change by 31st October.