Force Affiliate at Registration / Recurring Subs

Hi WP AM, Thank you for the Affiliate Plugin

1a Is it possible to force registration only if referred by an affiliate link?
ie without a referral the person cannot register and mgets message such as “You cannot register at this website without a referral. Make sure that you have arrived at this registration page by using the correct link. If you cannot register, please contact the person that referred you and request the correct link or their referral ID.”

1b. &/Or Is there a field on registration where the referred person can add in the referrer’s / affiliate ID?
It would be good if the message above could be customized 🙂

2. Does Affiliate Manager track recurring subscriptions?
ie If person signs up for $100 / year subscription, and the affiliate amount is $50, when the subscription is paid does the Affiliate automatically get credited the amount, and conversely, should a member cancel subscription, does WP AF recognize this as well?

My membership plugin is s2Membership Pro and I have Affiliates Manager S2Member Integration plugin added.

And if any are not already possible, could they be requested as future features please?

thank you.