I e-mailed their reservations team asking them to email revenue management to see if they could open 2 more 'I' seats on ADD - VFA for me. Here is the response I got:
This is to kindly advise you that business mileage class purchasable "I" are limited, last minute upgrade is optional if business class are available and check other alternative traveling dates.
I have expertflyer alerts up and day before/of flight I'll ask again via twitter/e-mail and finally at the gate during boarding to try one last time.