See recent Birchbox articles.
Birchbox gives at least 5 beauty samples each month for $10, which is half the cost of the Men’s Box. Boxes get customized to your beauty profile to a degree, but you cannot opt out of any type of sample. There is an option to select a sample (from a choice of 3-5 items) or the featured box where you know all 5-7 samples up front. Subscribers can review 5 samples for 10 points each once during the lifetime of the account. Unless you pay a year up front, you do not get any points for the cost of your subscription. That means there is no rewards program whatsoever for month-to-month plans after five reviews. With no rewards, the boxes have to speak for themselves in value. The samples will always go over $10 in value, but will the value you get from them equal $10!