Officially it’s limited to the first 5,000 people, however when I just added my wish (8,169 to Bora Bora) it said that I would receive my points in 6 weeks.
Which means either that:
-Many of the entrants did not add their SPG numbers after making their wish so they won’t be receiving their points and they weren’t counted in the 5,000.
-Or that Starwood isn’t enforcing the 5,000 person limit.
-Or that Starwood wrote that I’ll be getting the points but really didn’t mean it due to a glitch.
Either way I figured I’d post and let you decide if it’s worth 2 minutes of your time. If you enter post a comment after claiming your points with what the message says and what number wish you had.