When your subscriptionenters into effect, you have made your purchase. This one's a bit weird because it seems like it should refer to a subscription, but I guess it is a one time subscription, and your subscription lasts your whole life?
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
This is the store where I bought the fake Chanel Number 5.