Discount for second and cheapest membership

I wish to be able to have members sign up for several memberships - the cheapest membership should be 30% of original price. How is that done?
 

Sorry Maria. We do not support that option. Each time users can only subscribe for one plan, not multiple plan

Maybe you will have to handle it manually somehow. For example, when someone subscribes for a plan, you can create a coupon code and send it to him manually so that they can use it to receive discount for the next subscription

Tuan