Currently, it is not integrated. But you can achieve this with a little work-around:

1.) Subscribe normally to the plan you want to use

2.) After the payment went through, cancel the subscription as described here: Cancel Paypal subscription

When the payment period you have chosen is over, we will set your account to "private". This implies: all art and exhibitions will be unpublished and no longer viewable for visitors. Your account is still accessible and works normally. If you want to publish again, simply upgrade your account to a paid plan.