So when a new expansion pack comes out I believe a great option for long(ish) time subscribers would be we could get it for free, as long as we commit to 6 months of subscription. here is an example:
When Mists of Pandara came out, those who have been subscribed for 12 months and over (consecutively with no cancellations in between) would get the expansion free of charge. They would also commit to a minimum of 6 months after that.
Thoughts?