I 訂閱"孕媽媽"月刊 for 1 year, just finished the subscription in April. The "Ha Fa" sales called me and asked whether I wanted to re-order, and I re-ordered the "媽媽寶寶" for another year. I found these 2 magazines are very useful, and I liked shopping BB's items, so, I could enjoy the discount with the membership card.
If you don't know whether you will like it or not, you could try to subscribe for 1 year first. When you finish the subscription, I think the sales will call you and offer you special price if you want to continue the subscription for another year, so, there is not much difference than subscribing 2 years at the very beginning in terms of price.