RIght approach for Custom Capabilities

Want to share what I am doing and see if anyone do it differently.

I have many posts and CPT in a wordpress site. I have a free subscription and a payed subscription. According to them in the single.php view the user can see partial or whole content.
Then I have another part of my template with other things :

• other paragraphs
• and post attachments (like ZIP,PDF)

which I want to make available only with a separate purchase. Maybe users won’t have to be Members yet to buy these informations, but is still to be decided.

My approach is to dinamically set a Custom capability and his related Pro Form, using for the CC name the ID of the POST (which will be surely unique).
Here is the code:

Some free content

    
    Some premium content for all Level 1 Members.

    
        Display text and attachments as well.
        
    
    

    Some public content and a Paypal button (shortcode below)

Then the Paypal Pro form would be:

I have not tested yet, anybody thinks it is well made?
Jason Caldwell, your opinion is welcome!

Hi David.

You put [hilite mono]the_ID()[/hilite] inside single quotes, so it’s a string, not a function call.