You just tell them that you don't find it valuable and if you've been a customer for long enough they will bend over backwards to keep you. I used to buy several copies of CS3 and CS4 back when they came on DVD and I'm still using the same account, and moved to subscriptions with three seats as soon as they came in. So my LTV is probably fairly compared to a normal "consumer" account where they've only ever subscribed. Obviously compared to an enterprise account it's nothing, but if you're buying enterprise licensing I imagine you're getting it for less than $30 per seat per month.
