I read about upgrades on the billing page. It explains that a monthly plan can be upgraded to another monthly plan. It doesn't state how a yearly plan can be upgraded to another yearly plan. Is this possible?
Example: Suppose I sign up for the $4.00/month plan and pay for a year ($44.00) and three months later I find I need more bandwidth or disk space and want to upgrade to the $5.00/month plan and pay yearly. Can I just pay $48.00 ($60.00-$12.00 for the three months used)?
I realize I wouldn't get the free month on the second plan and there isn't any prorating within the month.
If this isn't possible, it makes buying the year plan more of a risk or am I missing something.