For people with the Starwood American Express card, just add two new people to your account and make a purchase to earn 2,000 bonus Starpoints. They just need the names of two new people, and no additional information is needed. I would put my mom and dad’s name to get the additional bonus points free. From the website:
1,000 bonus Starpoints will be awarded to your Starwood Preferred Guest Account 8-12 weeks after the first purchase on an approved Additional Starwood Preferred Guest Credit Card submitted with this application. The Additional Cardmember must make their first purchase with the Starwood Preferred Guest Credit Card within one year of Card approval. Bonus offer applies to first 2 Additional Card added on this application only.
Starwood Preferred Guest from American Express is an excellent reward card. Currently, you can get 10000 bonus starpoints for signing up. The 10000 Starpoints can be exchanged for $100 gift card or 3 hotel nights stay. You can read the full review here.