I've thought about pricing like this in the past but it's important to consider what happens when you decide to stop working on/supporting/customer service. If

I've thought about pricing like this in the past but it's important to consider what happens when you decide to stop working on/supporting/customer service. If memory serves, there was a bit of backlash against 37Signals when they shuttered Breeze (https://basecamp.com/breeze https://basecamp.com/breeze) especially because of the lifetime pricing.