Membership 2 is an awesome plugin to sell your content. That being said, you can charge your members to see your site content.
If you want to give discount, you can use Coupon addon. You have to enable from Membership 2 > Addons and then you can create coupons and share with your users. Today I will show you a trick to share coupon embedded with URL. You can share your URl like domain.com/?coupon=XXXX and the XXXX coupon will be automatically applied on checkout. Read More