Currently we offer free lifetime updates and support with all of our themes, however we will soon be moving to an Annual subscription model. So what this means is that existing customers who have purchased their theme(s) with free lifetime updates will continue to receive this as promised when they signed up, whereas any new theme purchases or upgrades of license type (i.e. standard edition to developer edition), will be subject to the annual subscription fee.
So in short, it's better to buy now than later ;)