http://www.thymes.com/Thymes-Fragrance-Panel/

This is how it works

It’s free and simple: you sign up, give us some basic demographic information about yourself and then tell us your favorite Thymes fragrances. When we are ready to send out a new fragrance, you’ll get an email asking if you want to participate. If you say yes, you’ll get a sample of the new fragrance and be asked to fill out a short survey.