I just checked my account and over a year ago I upgraded from Logos 5 Platinum to Logos 6 Gold and paid a little over $400. I recently upgraded my Logos 6 Gold to Logos 7 Gold and paid over $600. Why am I paying over $200 more for this upgrade?
Compare the resources added ... the contents of the packages change which means there are resources in the new package you do not own. There is no reason to expect that the resource (number or price) that you do not own is constant from one time to the next.
It seems to me that they are charging extra for the Full Feature Set when in the last upgrade it was included in the price. They are even now showing it separately when you upgrade.
they are charging extra for the Full Feature Set
No, before it was added into the price as one had no option but to buy the feature set to have the new features. Now you may have the new features either by (1) buying the feature set or (2) belonging to Logos Now so they have made the purchase of the set optional ...
I recently upgraded my Logos 6 Gold to Logos 7 Gold and paid over $600.
I have Logos 6 Silver + Logos 6 P&C Bronze and would pay nearly $700 to upgrade to Logos 7 Gold. If you do the math you will find that you are paying about 1/9 the full value of your new resources; much the same as with Logos 6 Gold.