Membership customisation (limit posts per day, subscribe to selected role)

Hi There,
I am building new project http://amazonau.com.au

I would like to use "Membership" plugin and make 3 types subscriptions.
1. Subscriber will be able to post 1 post per day.
2. Subscriber will be able post up to 5 posts per day.
3. Unlimited posts.

Problem nr.1 how to make limitation using Membership plugin ? Problem nr2. How to make automatic user subscription on registration to selected role for example contributor ? Thanks for answers.