Why does it cost more for an Edition Upgrade versus buying a higher simultaneous call edition? For example, the difference between the initial cost of a Professional vs. Enterprise editions is $700 USD ($1,295 vs. $1,995). However, to purchase an Edition Upgrade from Pro to Ent (i.e. 16 to 32 sim. calls) the cost is $1,348 USD. Why does it cost $648 more to upgrade the edition? That is a 90%+ price increase! I'm in the software business and I don't know of any company that penalizes customers for buying more licenses. And I can't think of any reason (technical or business) that would cause an Edition Upgrade to be more expensive, except greed (i.e. we have the customer hooked so let's charge them a little extra because the cost of switching from us now will be too difficult). A 90%+ price increase is excessive and I don't think you should treat current customers in this way. I respectfully ask that 3cx re-evaluate this aspect of your license costs. You have a great product, and an otherwise reasonable license scheme. Please don't make it hard for customers like me to upgrade as our business grows.