Catch Responsive Theme – Why Paid Updates?

I was seriously considering upgrading to your Pro version of Catch Responsive theme for my client, when I saw that you will only provide theme updates for 1 year! Does this mean I will have to purchase your theme fresh every year just to get updates??? Your free version gives free updates but not your pro version (?) This is very strange - it is preventing me from purchasing your pro version. Please explain or I will have to look for another provider for all my clients