AceBIT

Why is it that the Upgrade from Version 4 Standard to Pro is $69 USD but the Upgrade from Version 3 to Version 4 Pro is only $39 USD?
This is exactly how it is worded on the order page:

Upgrade to Ranking Toolbox Professional 4 from Ranking Toolbox 3.x
You have Ranking Toolbox 3.x and you wish to upgrade to version 4 of the Professional edition.
$ 39.00

Upgrade to Ranking Toolbox Professional 4 from Ranking Toolbox Standard 4
You have version 4.x of the Standard edition of Ranking Toolbox and you wish to upgrade to version 4 Professional.
$ 69.00

Was something left out; say the word "Professional"???
Am I mis-reading something in the page content???
Is this a marketing effort to get Version 3 users to up-grade at the expense of Version 4 Standard user's?
Just curious here in Idaho.

With version 4 we introduced a Professional and a Standard edition. Therefore Ranking Toolbox 3 is the predecessor product of Ranking Toolbox 4 Professional. This is the reason, why updating from RT 3 to RT 4 is cheaper than from RT 4 Std to RT 4 Pro.