How Can I Use A Membership Site Bonus To Increase Conversions & Sales Of My Affiliate Product

How Can I Use A Membership Site Bonus To Increase Conversions & Sales Of My Affiliate Product

I am considering offering Free Access To A Membership Site as one of the Bonuses I will be offering only to those who buy the Affiliate Product I am selling as an affiliate as an incentive to take action.

NOTE
At the moment I am not so concerned about making recurring revenue from my membership, as much as using it to increase conversions of signups to my webinar & sales of my affiliate product, to help me to build my list, to help me build a relationship with my list

Goal:
> to increase signups for webinar
> to increase sales of product after webinar
> use it to build my email list
> to provide content in membership site that will help buyers of my affiliate product


Questions:

1) is there a free simple wp membership plugin that I can get started with
2) in what ways can I use a membership site to increase sales & build my list
3) what concerns or & questions I should have about a membership site
4) what membership software do you recommend and why
5) what additional advice can you give me that I did not ask a question about

Thanks everyone