The url to go to PayPal is dynamically generated as it needs all the purchase and return info added to it.

Makes total sense.

So I think we are back to the idea that using a plugin to display ABPro within an article is fine, as long as we are not using the PayPal integration.

If we are using the PayPal integration, then it probably is not able to generate the link and/or preserve the transaction data.

Either way, I don't see this as a big deal. You must have a direct menu link to ABPro anyway. So in your content article, just make a link to the ABPro menu item.

Another thing that we do sometimes is create a custom module to draw attention to the online booking services. For example, in Monique's case, it says:Are You Ready? Click Here to schedule your session. And 'click here' is a link to the ABPro menu item.