Specific Page Access Restrictions Resend Link

Someone posted this question in the forum on 23 September:
What if the client loses the email with the link to page he bought?
I’m using Specific Post/Page Access Restrictions and the client lost the email he received after buying the page
and he´s asking me to resend it. How can i do it?

And the reply given was:
Check under Dashboard -› s2Member® -› PayPal® Buttons -› Specific Post/Page Access Links, you will be able to re-generate the access link.

I just had a request for the same from a client this morning. But it appears that if you give someone the link generated, that link can be reposted in any browser and available to anyone who has not paid if the client decides to share it. Is there another way to give the link where there would have to be something to prevent this from happening if Paypal is the payment gateway?

After further testing, it appears that a person at least has to be signed in to the members area, but that could mean free members could access the page too.

The other concern I have is that I do not receive notifications when someone buys a page/post specific product. I usually only find out when I open my paypal account for some other reason. This is always a good surprise, but should I be getting an email to notify me when a post specific sale is made? I do have the IPN set up and do receive notifications when a new member signs up.