Your plugin seems to be the perfect one for me.
I have two needs:
1-I will sell subscription, each subscriber can only buy 7 product (no more no less)
2-Each subscriber can only order once a week
I know that your plugin is meeting my first need, since it is the only that takes groups into account. But it do not seem to meet my second need. Is it for me to easily modify lifetime purchase rules to allow a subscriber to order only once a week?