Shoppers Drug Mart is currently holding a promotion whereby if you spend $30 or more on any Biotherm products, you get one product free. The free product is valued at $30 or more. I went yesterday and bought a facial cream for $49 and got another kind worth $49 for free. The cashier told me that for every product purchased over $30, you get one free, so if you buy two and each is over $30, you get to choose two free products. Also, if you purchased over $100 worth of Biotherm products, you get 10,000 bonus points! The free product does count towards the $100 spent as I only purchased two products, one $49 and another for $15, but since the free product was also $49, total was over $100 and I got the 10,000 bonus points!
Promotion is ending sometime in September. Date has yet to be confirmed.
I recommend you call the store you are planning to visit to inquire before heading there as although a lot of the stores are having the promotion, not all of them are.