The PayPal form addon is brilliant, but I was trying to make a form dynamically allow a customer to buy an initial service (web designing) and, simultaneously set-up recurring hosting payments that kick in after a fixed period of free hosting.
This would be easy of there was only one option; set a fixed amount in "Trial" and set the monthly or yearly hosting fee in the form and pull it into the PayPal addon via the field selector.
However, as with anything, there are options.
So, I am hoping this will eventually be possible.
After the customer selects the services they want, the "Total" to be selectable in the PayPal addon as the "Trial" value and another field to be selected as the monthly / yearly recurring amount.
Martin